Re: Coordinate time vs Proper time

2020-05-22 Thread 'Brent Meeker' via Everything List
On 5/22/2020 6:26 PM, Alan Grayson wrote: On Monday, May 18, 2020 at 3:28:40 PM UTC-6, Alan Grayson wrote: Suppose the universe is a hyper-sphere, not expanding, and an observer travels on a closed loop and returns to his spatial starting point. His elapsed or proper time will

Re: Coordinate time vs Proper time

2020-05-22 Thread Alan Grayson
On Friday, May 22, 2020 at 9:05:23 PM UTC-6, Brent wrote: > > > > On 5/22/2020 6:26 PM, Alan Grayson wrote: > > > > On Monday, May 18, 2020 at 3:28:40 PM UTC-6, Alan Grayson wrote: >> >> Suppose the universe is a hyper-sphere, not expanding, and an observer >> travels on a closed loop and

Re: Coordinate time vs Proper time

2020-05-22 Thread 'Brent Meeker' via Everything List
On 5/22/2020 9:48 PM, Alan Grayson wrote: On Friday, May 22, 2020 at 9:05:23 PM UTC-6, Brent wrote: On 5/22/2020 6:26 PM, Alan Grayson wrote: On Monday, May 18, 2020 at 3:28:40 PM UTC-6, Alan Grayson wrote: Suppose the universe is a hyper-sphere, not expanding, and an

Models as Code (Differentiable Programming)

2020-05-22 Thread Philip Thrift
Models as Code: Differentiable Programming with Zygote (Julia programming language) video: https://www.youtube.com/watch?v=Sv3d0k7wWHk slides: https://www.microsoft.com/en-us/research/uploads/prod/2019/06/Models-as-Code-Differentiable-Programming-with-Zygote-slides.pdf Zygote:

Summer weather and COVID-19

2020-05-22 Thread John Clark
A new study from Harvard indicates that warmer weather and more humidity and UV exposure will only modestly slow down the spread of the virus. It all depends on the R value, the average number of people a infected person will pass on the disease to others, if it's less than 1 the virus will

"magic" (in programming)

2020-05-22 Thread Philip Thrift
The term "magic" implies that the hidden complexity is at least in principle understandable, in contrast to black magic and deep magic (see Variants ), which describe arcane techniques that are deliberately hidden or extremely

Re: Universe as a simulated strange loop

2020-05-22 Thread Bruno Marchal
> On 20 May 2020, at 23:24, 'Brent Meeker' via Everything List > wrote: > > > > On 5/20/2020 5:24 AM, Bruno Marchal wrote: >> >>> On 18 May 2020, at 21:35, 'Brent Meeker' via Everything List >>> >> > wrote: >>> >>> >>> >>> On 5/18/2020 3:03 AM,

Re: The size of the universe

2020-05-22 Thread Bruno Marchal
> On 21 May 2020, at 21:43, Jason Resch wrote: > > > > On Thu, May 21, 2020 at 1:33 PM Bruno Marchal > wrote: > >> On 20 May 2020, at 18:45, Jason Resch > > wrote: >> >> >> >> On Wed, May 20, 2020 at 7:05 AM Bruno Marchal >

Re: STEP 3

2020-05-22 Thread 'Brent Meeker' via Everything List
On 5/22/2020 1:48 PM, Jason Resch wrote: On Fri, May 22, 2020 at 3:27 PM 'Brent Meeker' via Everything List > wrote: On 8/4/2019 10:44 AM, Jason Resch wrote: On Friday, August 2, 2019, 'Brent Meeker' via Everything List

Re: Coordinate time vs Proper time

2020-05-22 Thread Alan Grayson
On Monday, May 18, 2020 at 3:28:40 PM UTC-6, Alan Grayson wrote: > > Suppose the universe is a hyper-sphere, not expanding, and an observer > travels on a closed loop and returns to his spatial starting point. His > elapsed or proper time will be finite, but what is his coordinate time at >

Re: "Shape" of the universe

2020-05-22 Thread Alan Grayson
On Tuesday, May 19, 2020 at 11:18:15 PM UTC-6, Alan Grayson wrote: > > > > On Tuesday, May 19, 2020 at 6:26:08 PM UTC-6, Lawrence Crowell wrote: >> >> You cannot of course circumnavigate the spatial manifold of the universe. >> Anything beyond the cosmological horizon moves away faster than you

Re: The size of the universe

2020-05-22 Thread Jason Resch
On Fri, May 22, 2020 at 9:23 AM Bruno Marchal wrote: > > On 21 May 2020, at 21:43, Jason Resch wrote: > > > > On Thu, May 21, 2020 at 1:33 PM Bruno Marchal wrote: > >> >> On 20 May 2020, at 18:45, Jason Resch wrote: >> >> >> >> On Wed, May 20, 2020 at 7:05 AM Bruno Marchal wrote: >> >>> >>>

Re: STEP 3

2020-05-22 Thread 'Brent Meeker' via Everything List
On 8/4/2019 10:44 AM, Jason Resch wrote: On Friday, August 2, 2019, 'Brent Meeker' via Everything List > wrote: On 8/2/2019 1:06 PM, Jason Resch wrote: On Fri, Aug 2, 2019 at 1:40 PM 'Brent Meeker' via Everything List

Re: STEP 3

2020-05-22 Thread Jason Resch
On Fri, May 22, 2020 at 3:27 PM 'Brent Meeker' via Everything List < everything-list@googlegroups.com> wrote: > > > On 8/4/2019 10:44 AM, Jason Resch wrote: > > > > On Friday, August 2, 2019, 'Brent Meeker' via Everything List < > everything-list@googlegroups.com> wrote: > >> >> >> On 8/2/2019

Re: STEP 3

2020-05-22 Thread Bruce Kellett
On Sat, May 23, 2020 at 6:48 AM Jason Resch wrote: > > If Holebo's theorem remains fundamental problems, then let's move > everything into virtual reality, and repeat the experiment. > > In one case your friend's mind file is deleted and restored from a backup, > and in another he continued

Re: "magic" (in programming)

2020-05-22 Thread spudboy100 via Everything List
Yes indeed! Charles Stross's Series, The Laundry Files is an extension of Lovecraft mixed with La Carre' + Terry Pratchett.  " As a branch of applied mathematics, magic was practiced on an ad-hoc basis prior to its systematization by Alan Turing in the 1940s. Wartime efforts combined the