Ed et al. --
Hope you guys saw this interesting story in the NYT Magazine yesterday
about Ingrid Daubechies. A wonderful character with a great mind.
https://www.nytimes.com/2021/09/14/magazine/ingrid-daubechies.html
TJ
On Mon, Sep 20, 2021 at 6:04 PM Edward Angel wrote:
> Quaternions avoid mu
Quaternions avoid much of the ugly trigonometry since quaternion rotation is
along a great circle. They’re very useful for smooth rotations in computer
graphics and many aerospace applications.
Ed
___
Ed Angel
Founding Director, Art, Research, Technology and Science Laborat
I'm imagining a post near-apocalyptic world where the near-future
MAGAmorlocks watch ElonMuskishEloi flying machines traveling high in the
sky (with or without contrails) and set their crude sextants on the
problem of shooting a trajectory and from that guestimating which known
megaCity Enclaves th
I'm wondering if there are any obvious rule-of-thumb ways to guess or
recognize "great-circleness".
It seems like such calculations are (too) full of compound trig
functions to intuit easily?
On 9/19/21 1:53 PM, Edward Angel wrote:
> Close: https://www.airmilescalculator.com/distance/clt-to-h
In November 1994 I was on a sailing trip down the Chilean islands. Local time
was an hour *later* than NY time. I think part of that was that Chile was on
daylight savings time.
I once flew from Seattle to LA to get on a flight to Beijing. That flight took
us back over Seattle, Anchorage, and t
Sent: Sunday, September 19, 2021 10:24 PM
To: The Friday Morning Applied Complexity Coffee Group
Subject: Re: [FRIAM] Great Circle
The basic insight is that the central limit of random walks from any point in a
soap bubble (whose surface is a harmonic potential function) to the boundary
will
The basic insight is that the central limit of random walks from any point
in a soap bubble (whose surface is a harmonic potential function) to the
boundary will generate the harmonic function.
On Sun, Sep 19, 2021 at 7:53 PM Jon Zingale wrote:
> "Is this related, at some level, to..."
>
> Oh y
"Is this related, at some level, to..."
Oh yeah, like in classical geometric probability. Yeah, I wonder too.
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Is this related, at some level, to numerically integrating a function on an
interval by randomly generating points and counting what percentage lie
inside versus outside, etc?
---
Frank C. Wimberly
140 Calle Ojo Feliz,
Santa Fe, NM 87505
505 670-9918
Santa Fe, NM
On Sun, Sep 19, 2021, 5:37 PM Jo
In the northern hemisphere a great circle route between two points with the
same latitude will be north of the parallel, so if the latitudes are close, the
great circle will arch above the straight line (for most map projections that
keep “parallels” parallel). A gnomonic projection of the world
"Not to change the subject but..."
Oh, there's no change of subject at all (relative to the discussion of
Random Evolutions). It seems with your mentioning of geodesics that we are
back talking about harmonic functions.
SteveG, did you happen to read the Scientific American paper that RogerF
and
Interesting too to get distances for a question I have often asked folks:
Santiago, Chile is on the west coast of South America. Which US city has
the closest value of longitude? often have to remind that longitudes are
the north/south meridians / lines on the globe.
1. Los Angeles
2. Houst
That gives a good view, Stephen. Hawaii is farther south than I thought.
Thanks.
---
Frank C. Wimberly
140 Calle Ojo Feliz,
Santa Fe, NM 87505
505 670-9918
Santa Fe, NM
On Sun, Sep 19, 2021, 3:19 PM Stephen Guerin
wrote:
> I was going to post this similar site but Ed beat me with his :-) This
I was going to post this similar site but Ed beat me with his :-) This one
also has a globe view...
https://www.greatcirclemap.com/globe?routes=CLT-HNL
___
stephen.gue...@simtable.com
CEO, Simtable http://www.simtable.com
1600 L
Thanks, Ed. That's useful.
---
Frank C. Wimberly
140 Calle Ojo Feliz,
Santa Fe, NM 87505
505 670-9918
Santa Fe, NM
On Sun, Sep 19, 2021, 1:54 PM Edward Angel wrote:
> Close: https://www.airmilescalculator.com/distance/clt-to-hnl/
> ___
>
> Ed Angel
>
> Founding Director, A
Close: https://www.airmilescalculator.com/distance/clt-to-hnl/
___
Ed Angel
Founding Director, Art, Research, Technology and Science Laboratory (ARTS Lab)
Professor Emeritus of Computer Science, University of New Mexico
1017 Sierra Pinon
Santa Fe, NM 87501
505-984-0136 (home)
Not to change the subject but...
A large airliner recently, 15 minutes ago, flew over Santa Fe headed west.
My Flight Radar app tells me that it's a Boeing 777 going from Charlotte to
Honolulu at an altitude of 38000 feet. I wouldn't have thought that Santa
Fe was on a great Circle route between
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