[Goanet] {Dilip's essays} And just so, we age gracefully

2024-03-30 Thread Dilip D'Souza
Mar 29 I've focused before on population and life expectancy and a demographic dividend and the Total Fertility Rate (TFR). A couple of years ago, India's TFR fell below so-called "replacement level". When I wrote about that at the time, some readers asked why our population was still growing. I

[Goanet] {Dilip's essays} Don't take tension, but the universe expands

2024-03-22 Thread Dilip D'Souza
Mar 22 Maybe it's pretty ordinary to others, including astronomers, but I found the Hubble Constant fascinating from the first time I heard about it. That's because of everything it builds on and suggests. A universe that's expanding (into what?). In every direction. The farther, the faster.

[Goanet] {Dilip's essays} The things a few calculations tell us

2024-03-19 Thread Dilip D'Souza
Mar 19 2024 ... and with this dispatch, I have finally caught up with my backlog. Which is apposite, you might say, because part of this column is about catching up with backlogs. Much bigger backlogs than mine, though. Actually this essay was prompted by a few unconnected bits of news, each of

[Goanet] {Dilip's essays} Searching for an invisible Ninth

2024-03-19 Thread Dilip D'Souza
Mar 19 2024 One more of those age-giveaways - you know, like postage stamps or music cassettes or dialing 180 - is the way you think of Pluto. If you know it as the outermost, or ninth, planet in our solar system, you're like me. That's how we grew up thinking of it. But as you may know, it has

[Goanet] {Dilip's essays} The finite that hints at the infinite

2024-03-19 Thread Dilip D'Souza
Mar 19 2024 This column grew out of an idle mind one morning, looking into my coffee cup. "How many bubbles?" I wondered. (Idle, yes.) Thing is, it isn't the actual answer that interests me as much as thinking about how I might try to find one - and what that process means. To me, it's a window

[Goanet] {Dilip's essays} A spectacular bridge that few use

2024-03-18 Thread Dilip D'Souza
Mar 18 2024 Shortly before I sat down to write this email, I was chatting with a friend who took a drive today on a section of Bombay's new "Coastal Road". This road is supposed to run along the western coast of the city, making commutes to and from the northern suburbs easier. As these things

[Goanet] {Dilip's essays} When signals in space get a response

2024-03-15 Thread Dilip D'Souza
Mar 15 2024 I have to make a serious attempt to catch up on my backlog here, and there's a reason I say that. Which I will get to after catching up! (So wish me well.) One of the more tantalizing things about our exploration of space is that starting a few decades ago, we have sent out

[Goanet] {Dilip's essays} Journey to the certainty of death

2024-03-15 Thread Dilip D'Souza
Mar 15 2024 There's a cartoon that makes the rounds regularly. It shows our globe with the heads of Easter Island on one side, and the stone pillars of Stonehenge on the other, looking like feet. Finally an explanation for these two strange phenomena: a man through the centre of the Earth. A

[Goanet] {Dilip's essays} Year of the tetrahedrals and triangles

2024-02-15 Thread Dilip D'Souza
February 15 2024 Put it down to a fair amount of travel in these first few weeks of 2024, including a fabulous birdwatching trip in the Sundarban Tiger Reserve in West Bengal: I'm so far behind on sending out my Mint columns here that I had lost track of the backlog. So let me try to make

[Goanet] {Dilip's essays} The point where Aditya stays put, almost

2024-02-15 Thread Dilip D'Souza
February 15 India sent a craft, Aditya-L1, hurtling through space a few months ago. It will study the sun. That's interesting by itself. But it also aims to settle at - or actually, in a small orbit around - a particular spot known as a Lagrangian point. There are five such points. (Or strictly,

[Goanet] {Dilip's essays} Year of the tetrahedrals and triangles

2024-02-15 Thread Dilip D'Souza
February 15 2024 Put it down to a fair amount of travel in these first few weeks of 2024, including a fabulous birdwatching trip in the Sundarban Tiger Reserve in West Bengal: I'm so far behind on sending out my Mint columns here that I had lost track of the backlog. So let me try to make

[Goanet] {Dilip's essays} How magicians control flip of a coin

2024-01-16 Thread Dilip D'Souza
Jan 16 2024 Maybe I should have realized it, but I didn't. There are magicians who can essentially control how a coin they flip lands. It needs practice, like all good things, but it can be done. Though if you're not motivated to start practicing that, there's something else to intrigue you.

[Goanet] {Dilip's essays} Bees understand zero means nothing

2023-12-27 Thread Dilip D'Souza
Dec 27 Hope Christmas/New Year week is treating you well! I would like to confess, hardly for the first time, that I am a fan of bees. To begin with, of course, any creatures that produce something as sublime as honey are special. But they are also mathematical creatures in a very real sense:

[Goanet] {Dilip's essays} Roadwalker: my new book

2023-12-27 Thread Dilip D'Souza
elped me decide — if I wasn’t doing the whole trip, there was a next best thing I could do."* Dilip D'Souza joined the Bharat Jodo Yatra four times. This is the story of that experience. But even more, this is the story of how he found energy, empathy and enthusiasm in the Yatra. How it spoke to

[Goanet] {Dilip's essays} The 20th is 22 septillion plus

2023-12-18 Thread Dilip D'Souza
December 15 The second of the columns I mentioned appeared last Friday, December 15. This is about a fantastic mathematical resource I ran into many years ago, that's constantly growing, that mathematicians find indispensable. I remember discussing it with a mathematician friend once in a crowded

[Goanet] {Dilip's essays} The moment when you add π

2023-12-18 Thread Dilip D'Souza
December 18 My last two Mint articles were more in line than some others with the label for the column, A Matter of Numbers. In a sense this goes back to how I first got interested in dabbling in mathematics, with the endless charms and mysteries of numbers themselves. This column was prompted

[Goanet] {Dilip's essays} The 41 men stuck in the tunnel

2023-11-26 Thread Dilip D'Souza
Nov 26 The astonishing and depressing news this morning is that at least one report says it might be Christmas before these men are rescued (

[Goanet] {Dilip's essays} Less than four at one blow

2023-11-17 Thread Dilip D'Souza
Nov 17 How good are you, or any of us, at estimating numbers? Sometimes I'll be in a crowd of people and I'll try to make a quick estimate of the numbers around me. I usually don't have a way to verify my guess, but I feel pretty confident in distinguishing between dozens, hundreds and thousands.

[Goanet] {Dilip's essays} Those circles in the sand

2023-11-17 Thread Dilip D'Souza
Nov 15 Backlog: two today, two (I hope) tomorrow. What's not to like about a phenomenon that has come to be called "fairy circles"? This: that I didn't know about them when I visited Namibia. How I'd like to have roamed among these mysterious formations in the desert. Still: yes, these circles

[Goanet] {Dilip's essays} The comet exploded, or it didn't

2023-11-17 Thread Dilip D'Souza
Nov 17 I've always believed that one of the great triumphs of science is the way it handles mistakes, or outright failure. To me, that's how scientific research progresses: try something, fail, learn, try again. Simplistic? Sure. But if you remember, it's how you learned to ride a bicycle, or

[Goanet] {Dilip's essays} The many victims of bloat

2023-11-17 Thread Dilip D'Souza
Nov 16 Tucked away at the back of my mind - for years now - is the little stat I use in the column below: the size of Lotus 1-2-3 when it first turned up on computers, versus when it was discontinued. Why should software expand like that, and faster than hardware power and storage does? It need

[Goanet] {Dilip's essays} To migrate or not to migrate

2023-10-14 Thread Dilip D'Souza
Oct 14 Some of you have heard me tell the story of captive-bred whooping cranes at the International Crane Foundation in Wisconsin. In particular, how they were taught to migrate. That story always leaves me awestruck: how do you teach something that is essentially instinct? Bird migration is a

[Goanet] {Dilip's essays} Twist in the tale of the Möbius strip

2023-10-14 Thread Dilip D'Souza
Oct 14 Who doesn't like Möbius strips? I think what fascinated me most about them was that it was so easy to make something that is so full of surprises. Try it and be surprised all over again! There's a certain mathematical conjecture about them that has resisted proof for nearly half a

[Goanet] {Dilip's essays} Whither, scientific temper?

2023-10-01 Thread Dilip D'Souza
nted out) is perhaps grammatically wrong, but I kind of liked it. cheers, dilip --- Requiem for a scientific temperament? --- Dilip D'Souza Every so often, there's news that makes me despair that we will ever build a scientific temperament in this country. This column is abou

[Goanet] {Dilip's essays} Cosmic curio: A little bit of Bennu

2023-10-01 Thread Dilip D'Souza
Oct 1 Don't know if you've noticed, but in recent years we (meaning us humans) have had a number of encounters with asteroids and comets. In 2014, a spacecraft called Philae dropped (on purpose) onto a comet called 67P. In 2020, OSIRIS-REx carefully picked up a cupful of rubble and stones from

[Goanet] {Dilip's essays} Students watch an orbit shorten

2023-09-22 Thread Dilip D'Souza
Sep 22 Nearly a year ago, a spacecraft we launched nearly two years ago slammed into an asteroid. This was the DART mission, hitting the asteroid Dimorphos. The idea was to see if we can alter the path through space of such an object. Because who knows, one day we might find that such an object

[Goanet] {Dilip's essays} This time, take the fifth

2023-09-14 Thread Dilip D'Souza
Sep 14 Once more, I prefer my title - "This time, take the fifth" - to the one the folks at Mint gave ("The untold story of the little finger"). But never mind. This column is about the utility (or otherwise) of that fifth finger you have on each of your hands. The smallest, the thinnest,

[Goanet] {Dilip's essays} Doug Lenat and the search for AI

2023-09-14 Thread Dilip D'Souza
Sep 14 In all the fuss and uproar about AI that's around us today, there are probably only a handful of folks who remember that there was once another way researchers thought about and approached AI. Yet even to me, just a once-dabbler in some of all that, that other way always seemed more

[Goanet] {Dilip's essays} That moment above the moon

2023-08-26 Thread Dilip D'Souza
Aug 26 Did you hear? An Indian space mission landed on the Moon on Wednesday! Of course you heard. Three cheers for Chandrayaan-3. And spare a thought for Chandrayaan-1, which didn't land but deduced that there was water on the moon about 12 years ago; and Chandrayaan-2, which attempted to land

[Goanet] {Dilip's essays} Rose by another name goes extinct

2023-08-14 Thread Dilip D'Souza
August 14 My first name is the 399th most common in the world. Yours? But more interesting than that is that some names vanish over time. Why and how? As often happens - as you might guess - that's a phenomenon that's attracted the attention of mathematicians. And there are links to entirely

[Goanet] {Dilip's essays} Frozen worms and the cost of sex

2023-08-14 Thread Dilip D'Souza
August 14 If my previous column mentioned a book by a Eugene, this one mentions a book about a Eugeni. Read on to know more about that. Though this column is really about certain tiny worms that lived tens of thousands of years ago and have been brought back to life, to the extent that they have

[Goanet] {Dilip's essays} Oppenheimer: grim calculus of war

2023-08-14 Thread Dilip D'Souza
Aug 14 Opparently like most of you, I went to see "Oppenheimer" in late July. Late night show, so I actually fell asleep through part of the film, so I went to see it again a few days ago. Lots to think about in this portrait of a complex, fascinating man. It also got me thinking about war. My

[Goanet] {Dilip's essays} Re: Rose by another name goes extinct

2023-08-14 Thread Dilip D'Souza
PS: There are references to both Shakespeare and Monty Python in this particular column. Let me know if you catch them. d. --- Rose by another name goes extinct A few days ago, I alerted a friend to the excellent news that her name, Shormishtha, was the 4,213,784th most common name in the

[Goanet] {Dilip's essays} Ms Granville and our Moonshot

2023-08-14 Thread Dilip D'Souza
August 14 India's second mission to attempt a (soft) landing on the Moon, Chandrayaan-3, is orbiting that celestial rock as I write this. Having written about Chandrayaan-2 (2019) before, I wanted to find a different angle to take in writing about this one. So this column (July 21) is my tribute

[Goanet] {Dilip's essays} Birds, cats and evolution's way

2023-08-13 Thread Dilip D'Souza
Aug 13 Cheetahs have been on my mind, and I suspect I speak for a lot of people. India imported several cheetahs from Namibia and South Africa starting a year ago, in an effort to regenerate an Indian population of these exquisite animals. Sadly, six have died, as also three cubs born here

[Goanet] {Dilip's essays} The way of the water in tea, toilets

2023-07-29 Thread Dilip D'Souza
July 28 Whoops, I am six (6!) articles behind! Lots happening in these last few weeks, but that's no excuse. I promise not to inflict all six (6!) on you right now, though. Maybe 3. So this column takes a look at something I grew up taking for granted, and maybe you've heard it too: the water

[Goanet] {Dilip's essays} The waves come ashore, a few nanoseconds early

2023-07-29 Thread Dilip D'Souza
July 28 A third dispatch for now. Another three in the next day or two. When I wrote the previous column I've just sent out - about the majority in a democracy - someone said, "But I thought you were going to write about gravitational waves!" Because there was news in those several days about

[Goanet] {Dilip's essays} The majority and the promise of democracy

2023-07-29 Thread Dilip D'Souza
July 28 It's an odd thing. The weaker democracy gets, the louder the shouts you hear about how democracy is the "will of the majority", or some such. Well, what majority? That's one question to ask. Why that one rather than another one we might concoct? That's another. Can this logic stand some

[Goanet] {Dilip's essays} Swiss Family Bernoulli

2023-05-20 Thread Dilip D'Souza
May 20 While doing some other reading last week, I found my way to one of Srinivasa Ramanujan's earliest (the earliest? I don't know) papers, "Some Properties of Bernoulli's Numbers". It reminded me of something I've had at the back of my mind for a while: to write about the remarkable Bernoulli

[Goanet] {Dilip's essays} Seeing patterns where none appear

2023-05-15 Thread Dilip D'Souza
May 15 2023 A lot of us are glad and relieved about the result in a recent election in Karnataka. I may have more about that in another column. But this one that aired in Mint on Friday May 12 was actually prompted by something that happened during the campaign leading up to the election. It got

[Goanet] {Dilip's essays} Hit the ball, a moment in the sun

2023-05-15 Thread Dilip D'Souza
May 15 2023 This delay in sending out my columns is getting so routine that I should stop mentioning... There, I stopped. A friend alerted me to some research about how there's a steadily increasing number of home runs hit every baseball season. "Put a cricketing spin on it," he suggested, "and

[Goanet] {Dilip's essays} Jimmy Kimmel and a thinking hat

2023-05-15 Thread Dilip D'Souza
May 15 2023 How often do mathematical findings find their way to late-night talk shows? I'm still a little puzzled by why this particular one did. It made a splash in mathematical circles, certainly, but also the regular news in various places - and yes, even Jimmy Kimmel mentioned it (at the

[Goanet] {Dilip's essays} The mystery of the Tasmanian Tiger

2023-04-25 Thread Dilip D'Souza
April 25 Ever since my parents visited Tasmania, many years ago, I've wanted to visit too. At some point since, I read David Quammen's magnificent "The Song of the Dodo" and found out, for the first time, about the Tasmanian Tiger. More reason to visit, though he did point out that the said Tiger

[Goanet] {Dilip's essays} Very accurate, very hidden, covid test

2023-04-25 Thread Dilip D'Souza
April 25 2023 Yet one more time, I've fallen behind with these dispatches. So there are three coming your way today. (At least one of you groaned - in writing - when I last did this. I remember.) This column was spurred by the increase, again, in covid case counts. I don't mean to downplay that

[Goanet] {Dilip's essays} Call me the wanderer, I roam around

2023-04-03 Thread Dilip D'Souza
April 3 'Oumuamua is well on its way out of our solar system now. But its visit caused quite a flutter in astronomical circles, even though we didn't detect it till it was, yes, on its way out. Because, what was this strange object? Long and thin. No tail like comets usually have. Much much

[Goanet] {Dilip's essays} Nothing to do, planet Earth is blue

2023-03-18 Thread Dilip D'Souza
Mar 18 Many years ago I spent a fascinating couple of evenings with an astronomer at the McDonald Observatory in West Texas, watching him hunt for planets. Not the ones in our solar system, but possible ones somewhere else in the Milky Way, or even further out. Exoplanets, they're called. He

[Goanet] {Dilip's essays} Putting a $7 tn claim to the test

2023-03-18 Thread Dilip D'Souza
Mar 18 Far too often for me to keep up with, some set of figures makes the rounds, accompanied by plenty of drum-beating and chest-thumping and ... well, for me, brow-furrowing. Because so often, the figures don't make much sense. Or, more correctly, they make perfect sense, but the drum-beating

[Goanet] {Dilip's essays} Lessons in how to smash a skull

2023-02-25 Thread Dilip D'Souza
Feb 25 I was telling someone the other day that one of the great joys about writing this column for Mint is that I learn about so many different and fascinating scientific endeavours. Not necessary that I write about them all, but I love reading about them. This column resulted from one such. I

[Goanet] {Dilip's essays} Eliza old thing, your praises to sing

2023-02-23 Thread Dilip D'Souza
February 23 I remember Eliza. Somebody introduced me to her early on in my time as a graduate Computer Science student at Brown. I was fascinated. I mean, it was a clever and innovative effort - but it didn't last long. It couldn't. Four decades on (!), today's Artificial Intelligence

[Goanet] {Dilip's essays} Strength in numbers (A book review)

2023-02-23 Thread Dilip D'Souza
February 23 Finally for this mailing ... for Shaastra magazine, I reviewed the mathematician John Allen Paulos's new book, "Who's Counting?" (or really, "Who'5 C0unt1ng?" which is how it appears on the cover). It's always a pleasure reading Paulos, and this book was no exception. Such a

[Goanet] {Dilip's essays} Sunita's Space Odyssey

2023-02-23 Thread Dilip D'Souza
February 23 Several months ago, the editor of Khabar Magazine - an Indian-American publication from Atlanta - got in touch and asked if I would interview the astronaut Sunita Williams for a cover story. I mean, how could I refuse? We spent some months, though, trying to see if I could do this in

[Goanet] {Dilip's essays} Take your time to choose, bee

2023-01-13 Thread Dilip D'Souza
Jan 13 And then there's today's column in Mint. Some years ago a lovely lady who's reading this (well, I hope) spent an afternoon explaining the "waggle dance" that bees do. She had earned her PhD studying bees (though maybe not the waggle dance), so I was inclined to pay attention. I'm glad I

[Goanet] {Dilip's essays} The early birds set the scene

2023-01-13 Thread Dilip D'Souza
Jan 13 Imagine, if you will, my delight when I ran across the factoid that kicks off this articleP: alligators and birds are more closely related than alligators and lizards. Fascinating, right? (Say yes, please.) Well, that's because of an aspect of evolution that has always baffled and puzzled

[Goanet] {Dilip's essays} Review: Manil Suri's "The Big Bang of Numbers"

2023-01-13 Thread Dilip D'Souza
Jan 13 A final missive for today... Shaastra magazine, the pretty new publication from IIT Madras, asked me to review Manil Suri's new book. Suri is an accomplished mathematician at the University of Maryland, and also an elegant writer. Some years ago we did a session together around a

[Goanet] {Dilip's essays} In this corner, an octopus that throws

2023-01-13 Thread Dilip D'Souza
Jan 13 (Friday the 13th!) You must be tiring of me saying this: yet again I've been lax about sending out my articles here. Five that I know of. Sorry, then, for inundating your mailbox! The first of these was prompted when I found a short video clip of an octopus. And this octopus was doing

[Goanet] {Dilip's essays} Figures that say things about us

2023-01-13 Thread Dilip D'Souza
Jan 13 This was my last column for 2022 (appeared on December 23, I took December 30 off from writing). It cobbles together my explorations into three uses of figures and prhases that bother me. (Two of them have always bothered me.) Partly because they are wrong. Partly because they cover more

[Goanet] {Dilip's essays} What citation numbers can be tweaked to suggest

2022-12-18 Thread Dilip D'Souza
Dec 9 Baba Ramdev is one of India's many "godmen", but one who has risen to power and prominence in the last 10-12 years. He is politically close to the party and people in power in India now, and who knows, maybe that's helped him rise. One of his endeavours is Patanjali, that produces all

[Goanet] {Dilip's essays} What cubes do that squares don't

2022-12-18 Thread Dilip D'Souza
Dec 9 A third bit of reading for you today... I'm invariably fascinated by the way mathematicians play with numbers, and today's column deals with one such. And in a way that touches on several different themes. There are integers that can be expressed as the sum of two rational squares, but

[Goanet] {Dilip's essays} And still she wobbles

2022-11-24 Thread Dilip D'Souza
Nov 23 Every now and then there's news of the Earth's rotation speeding up by some tiny slice of time - or slowing down, who knows. In following a trail of scientific papers after one recent such bit of news, I ran into mention of something that I had heard about a long time ago and filed away

[Goanet] {Dilip's essays} On the dark side of the moon

2022-11-24 Thread Dilip D'Souza
Nov 23 Just a day ago, the Orion spacecraft swung by the Moon - to within a few dozen km of its surface, in fact. This is the Artemis mission that plans to take humans back to the Moon - after 50 years! - and then beyond. Think of that. I mean, everything about space travel is awe-inspiring. But

[Goanet] {Dilip's essays} Bharat Jodo: On the Walk

2022-11-05 Thread Dilip D'Souza
Nov 4 The new issue of Frontline carries my "impressionistic" (their brief!) essay on walking with the Bharat Jodo Yatra last month. (You may remember that I already circulated two articles I wrote about the experience.) Bharat Jodo Yatra: On the walk,

[Goanet] {Dilip's essays} No left turn please; we’ll save fuel

2022-11-05 Thread Dilip D'Souza
Nov 4 Must be something about left turns. Some ants choose to take them. Some UPS trucks, I learned, choose not to take them. What I wouldn't give to see a line of alternating ants and UPS trucks. Still, why did UPS institute a policy - as at least some reports I've read claim they did - that

[Goanet] {Dilip's essays} The ground moves, beneath your feet

2022-11-05 Thread Dilip D'Souza
Nov 4 A few days ago, a bridge collapsed in Morbi, Gujarat, killing nearly 140 people. As if that wasn't enough of a tragedy, we've learned all kinds of unsavoury details since - the company that refurbished the bridge was a clock manufacturer; they reopened the bridge without official approval;

[Goanet] {Dilip's essays} An index that triggers a metric tonne of annoyance

2022-10-21 Thread Dilip D'Souza
Oct 21 2022 The Global Hunger Index (GHI) made news in India over the last few days: India ranked 107 out of 121 countries in the list. Not just that, India ranked below our South Asian neighbours Sri Lanka, Pakistan, Bangladesh and Nepal. This set off a small storm of outrage, much of it from

[Goanet] {Dilip's essays} Two days on a yatra; that tiny glimmer

2022-10-18 Thread Dilip D'Souza
Oct 17 If my previous article about the Bharat Jodo Yatra was about the logistics involved, this one is more about the spirit of it all. In some ways, I was trying to answer for myself why I joined the Yatra. Perhaps my answer will resonate with you. Let me know if so. (Let me know if you think

Re: [Goanet] {Dilip's essays} What I saw behind the scenes at the Bharat Jodo Yatra

2022-10-16 Thread Dilip D'Souza
Oct 16 Incidentally, I joined the Yatra with my brother Ravi and his wife Ramani. Ramani wrote this herself about how she saw the experience: https://scroll.in/article/1034856/protesting-shrinking-freedoms-walking-for-hope-what-i-saw-on-the-bharat-jodo-yatra Any thoughts welcome! And if you'd

[Goanet] {Dilip's essays} What I saw behind the scenes at the Bharat Jodo Yatra

2022-10-16 Thread Dilip D'Souza
Oct 16 Last weekend, a few of us joined the Bharat Jodo Yatra ("Journey to Heal India" might be the best translation). This is a journey on foot from Kanyakumari, the southern tip of India, to Kashmir in the north. Some 3500 km (over 2000 miles) largely on foot. It's been organized by the

[Goanet] {Dilip's essays} The numbers tell a DART story

2022-10-16 Thread Dilip D'Souza
Oct 16 As you've likely heard from me and others, a NASA spacecraft called DART smashed into an asteroid last month. A very distant asteroid. The idea was to see if such a crash could alter the path of the asteroid - and if that happened, it would prove we could at least hope to divert an

[Goanet] {Dilip's essays} Sing low, sweet sparrow

2022-10-04 Thread Dilip D'Souza
Oct 3 As it fades into history, I realize I miss the pandemic. Not, let me hasten to add, for the illness and tension and deaths - but for the enforced calmness, the minimal traffic, the sometimes brilliant blue skies. (Really!) And maybe we also heard birds a little more clearly. But even more

[Goanet] {Dilip's essays} Celebration of an obliteration

2022-10-04 Thread Dilip D'Souza
Oct 3 Last week, DART slammed into Dimorphos at a speed of over 20,000 kmph. It didn't survive. But it sent photographs till the very end, leaving watchers like me around the globe oohing and aahing in wonder. Never mind the why and wherefore, you can ooh and aah too. I couldn't resist writing

[Goanet] {Dilip's essays} Seven million mission? Maybe not

2022-09-17 Thread Dilip D'Souza
--- Seven million mission? Maybe not -- Dilip D'Souza Seven million is a huge number, you'll agree. That's about the population of Hyderabad, or Rio de Janeiro - not the biggest cities in the world, but pretty big anyway. Yet merely citing some cities' populations may not let

[Goanet] {Dilip's essays} Buckle up, numbers aplenty ahead

2022-09-09 Thread Dilip D'Souza
-numbers-aplenty-ahead-11662667113571.html Let me know if the numbers resonate with you. yours, dilip --- Buckle up, numbers aplenty ahead - Dilip D'Souza A few days ago, we heard that India's economy had overtaken the UK's. This makes India the 5th-largest in the world; ahead

[Goanet] {Dilip's essays} The deadly legacy of a crater

2022-09-09 Thread Dilip D'Souza
Sept 9 Is there anyone who's looked at an image of the surface of the Moon and wondered why the Earth is not similarly cratered? Me, as I got interested in things astronomical, It's one of the earliest conundrums I remember thinking about. There are reasons, the Earth's atmosphere being one, the

[Goanet] {Dilip's essays} An aging country considers its soldiers

2022-09-01 Thread Dilip D'Souza
Sep 1 Some weeks ago, the government announced a new scheme to recruit young men for our armed forces: Agnipath. This set off a wave of debate and protests and demands for it to be rolled back. I'm not sure that will happen, but there are questions that remain about Agnipath. This scheme has a

[Goanet] {Dilip's essays} Beware the swooping hawk

2022-09-01 Thread Dilip D'Souza
Sep 1 A few times in my life, I've spent a happy few hours perched at one end of an airport runway, watching planes land and take off. Maybe this doesn't really catch your fancy, but I've always enjoyed it. The first time, though, I came back with my fingers nearly frozen off. Really. Some 45

[Goanet] {Dilip's essays} How far is that oldest object, really?

2022-09-01 Thread Dilip D'Souza
Sep 1 Catch-up mode, again. My last dispatch here was about the discovery by the James Webb Space Telescope of the oldest object we humans have ever observed, a certain smudge in the sky named GLASS-z13. Also the furthest object we've seen. (Meet the oldest object ever seen,

[Goanet] {Dilip's essays} The enduring mystery of giraffe necks

2022-08-06 Thread Dilip D'Souza
August 5 For no reason I can put my finger on apart from laziness, I didn't send out a number of my columns in April/May/June. Maybe nobody missed them, maybe not. For what it's worth, I'll occasionally email one of those. Like this one, which is about the necks of giraffes. Why are they so

[Goanet] {Dilip's essays} Meet the oldest object ever seen

2022-08-06 Thread Dilip D'Souza
August 5 The very idea of a space telescope is far-out, no pun intended. It makes a whole lot of sense, of course - because it won't have to deal with dust and ambient light and pollution that earthbound telescopes are tormented by. But that we would design, build and rocket such an instrument

[Goanet] {Dilip's essays} Thumb rules for those who hunger for bamboo and larvae

2022-07-29 Thread Dilip D'Souza
July 29 Ah, Madagascar. What a country. I loved my two months backpacking there: the people, the sights, the hard knocks ... and the lemurs. I've always wanted to return, but haven't managed it yet. One of these weeks, for sure. But those lemurs. The oddest of them all is the aye-aye, and I feel

[Goanet] {Dilip's essays} The gap that wins the Fields: a correction (yet one more!)

2022-07-25 Thread Dilip D'Souza
In my essay, I write that the Prime Number Theorem states that there is an infinite number primes and that Euclid first proved this. Well, that's wrong! Euclid did prove the infinitude of primes (which is usually called simply Euclid's Theorem). But the Prime Number Theorem is something else

[Goanet] {Dilip's essays} The gap that wins the Fields

2022-07-25 Thread Dilip D'Souza
Jul 25 James Maynard of Oxford University won the Fields Medal this year for his work on prime numbers. Specifically, the Twin Primes Conjecture. Now I am drawn to mathematical work on numbers and primes like a horse to water (something like that). But what also struck me about Maynard is that

[Goanet] {Dilip's essays} A sphere by any other dimension

2022-07-15 Thread Dilip D'Souza
of it after reading the essay. A sphere by any other dimension, https://www.livemint.com/opinion/columns/a-sphere-by-any-other-dimension-11657820794142.html . cheers, dilip --- A sphere by any other dimension --- Dilip D'Souza It's a constant battle. After every meal, we take the dishes

[Goanet] {Dilip's essays} The night of the snow slab

2022-07-08 Thread Dilip D'Souza
July 8 2022 I imagine every country must have its share of stories about strange disappearances or mysterious deaths or high-profile murders (possibly never satisfactorily explained). Count among those the Joshi-Abhyankar murders in India, the disappearance of MH 370 in Malaysia, the Clutter

[Goanet] {Dilip's essays} And yet it moves, and how!

2022-07-08 Thread Dilip D'Souza
July 8 2022 There's always things to marvel at about the universe we occupy. That's not saying very much, I know. But even so, I'm filled with wonder at the sheer mayhem that's unfolding nearly anywhere you look in the sky. Mayhem, because by any measure you choose - distance, speed, temperature,

[Goanet] {Dilip's essays} It's abundant! Perfect! Prime!

2022-07-08 Thread Dilip D'Souza
Jul 8 2022 I had heard about perfect numbers - whose factors add up to the number itself - before. I had not heard about abundant and deficient numbers, though it should hardly be surprising that if perfect numbers are of mathematical interest, so are abundants and deficients. And once you start

[Goanet] {Dilip's essays} You must understand the methodology

2022-05-27 Thread Dilip D'Souza
May 27 A third successive column prompted by Covid death tolls; specifically, the claim by the World Health Organization that the virus killed many more people, worldwide, than countries have reported. As you know and I have mentioned before, the Indian government contests the WHO claim about

[Goanet] {Dilip's essays} A non-mathematical essay for a change

2022-05-22 Thread Dilip D'Souza
May 22 I used to write political/social commentary columns for years. Came a time when I started to feel like I had said all I had to say in that vein - really - so I do very little of it now. But once in a while I feel there's something that needs saying. Like last week, when I watched someone

[Goanet] {Dilip's essays} Life expectancies and tennis racquets

2022-05-20 Thread Dilip D'Souza
May 20 I'm still puzzling over why a remark about life expectancies brought up a long ago memory of restringing tennis racquets. Maybe you'll be able to explain that to me. But more seriously, I've been trying to understand what connects a country's population, its life expectancy, and the number

[Goanet] {Dilip's essays} There's science behind the softness

2022-05-15 Thread Dilip D'Souza
May 15 2022 "You should read this WSJ article," my bro-in-law said one day last week, and I don't take his recommendations lightly. So I read it immediately, and then quickly scratched the column I was more than halfway through writing. Instead, I wrote about the softness that this WSJ article

[Goanet] {Dilip's essays} WHO’s right about covid numbers?

2022-05-15 Thread Dilip D'Souza
Mar 15 2022 Some of you may have noticed that I've not sent out my columns for some months now. I was travelling in March-April, and it was pretty hectic, but that's really not an explanation. In any case, I'll try to make some amends, though not by flooding you with all those missing columns all

[Goanet] {Dilip's essays} Deoliwallahs at Princeton

2022-04-28 Thread Dilip D'Souza
Please join Joy Ma and me in our Deoliwallahs discussion at Princeton (online)! Thu Apr 28 noon Eastern, 9am Pacific, 5pm UK, 930pm India. Register here: https://piirs.princeton.edu/event/deoliwallahs-book-talk-joy-ma-and-dilip-dsouza cheers, dilip -- My book with Joy Ma: "The Deoliwallahs"

[Goanet] {Dilip's essays} Stokes takes Iyer to the fray

2022-04-01 Thread Dilip D'Souza
April 1 Sheer inertia, that's all. I'm a fool for indulging it. That's why I have not sent out my last several math columns, going back to early February I think! I'll make amends. Let me start, though, with the column that aired today (April 1). Only online, not in the paper (there's a story

[Goanet] {Dilip's essays} The Deoliwallahs: a discussion

2022-03-01 Thread Dilip D'Souza
Mar 1 2022 This year marks 75 years since India won freedom. It also marks 60 years since the short, sharp war we fought with China; which means 60 years since we started incarcerating 3000 Chinese-Indians in a prison camp in Deoli, Rajasthan. As you probably know, Joy Ma and I co-authored "The

[Goanet] {Dilip's essays} Oil man and mathematical enigma

2022-02-10 Thread Dilip D'Souza
Feb 10 And maybe this column isn't really about mathematics - except that I was just so captivated by the story of a oil tycoon called James Vaughn. He seems to have funded research into Fermat's Last Theorem over many decades, until Andrew Wiles proved it in the mid-1990s. (And then Vaughn's

[Goanet] {Dilip's essays} Making a case for Wednesday the 31st,

2022-02-10 Thread Dilip D'Souza
February 10 For no reason I can offer, I've slipped way behind (still again) with sending out my columns here. I have a backlog of three over the last month, and if I don't send this out before tomorrow, that will become four. So: this column appeared in January, on Friday the 14th. Near miss

[Goanet] {Dilip's essays} Are we inventors or discoverers?

2022-02-10 Thread Dilip D'Souza
Feb 10 Much like the nature vs nurture debate that has raged forever in psychology (and maybe elsewhere), mathematicians have long wondered: did we invent mathematics? Or discover it? It goes to the heart of what mathematics is, and how we look at it. I won't say more. This is what I tried to

[Goanet] {Dilip's essays} More women than men to tell a story

2022-01-09 Thread Dilip D'Souza
Jan 9 Some of you know that one of my pet peeves is how few of us journalist-types or -wannabes pay attention to numbers. I mean, really pay attention - examine them when they appear, try to understand them, see if they tell a story, whatever. A few weeks ago, some numbers made the news. One of

[Goanet] {Dilip's essays} Neena Gupta: in love with mathematics

2021-12-26 Thread Dilip D'Souza
Dec 26 It was Srinivasa Ramanujan's birthday on December 22, now observed as National Mathematics Day. That's why I waited till this last week to write about Neena Gupta. She's a mathematician at the Indian Statistical Institute in Calcutta (a breeding ground for plenty of outstanding

[Goanet] {Dilip's essays} There's a Webb to be weaved

2021-12-26 Thread Dilip D'Souza
Dec 26 Yesterday, the JWST finally took off from French Guiana and soared into space. That's the James Webb Space Telescope, a spectacular piece of design and engineering that will open our eyes to wonders of the universe that we can only guess at today. It's a triumph of human ingenuity that,

[Goanet] {Dilip's essays} Hubble was mind-blowing, but we're just getting started

2021-12-14 Thread Dilip D'Souza
Dec 13 2021 I remember when the Hubble Space Telescope was lifted into orbit, back in 1990. To this strictly amateur astronomy fan, it was a fantastic idea: look out at the universe from a place where Earth's lights and pollution would have no effect whatsoever. To see it actually take shape sent

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