« first day (3002 days earlier)      last day (51 days later) » 

1:12 AM
A new low for the FE: the autocompletion popup has frozen it completely and I will probably need to force-quit since it has been like this for 5 minutes
 
2:08 AM
@b3m2a1 at least it looks nice and in-focus while it freezes? D;
 
 
2 hours later…
4:30 AM
@andre314 Well, to be honest, I personally think our community is too friendly to unclear question these days. If OP fails to clarify, why not close? Kindly guessing the actual question and posting answers only leads to chaos in my opinion…
Yeah, having been using Mathematica for more than 7 years, I'm not sure how to pronounce it.
 
5:01 AM
@Searke I have mentioned it in rocket chat. I can submit an issue on redmine beta testing site, but please feel free to report it internally if you like.
@xzczd How about treating it as Latin?
 
5:33 AM
Too bad many of these SW Twitch sessions happen at such an ungodly hour from my perspective (like 22:49...).
Regarding latest brainstorming video, I actually came up with an idea of generating public encryption key, throwing away the private one, and adding public-key encrypted device IDs to a Bloom filter. Correctly parameterized filter could provide relatively reliable probability guarantees of match levels, not quite but similar to Bloom filters...
All this with marginal chances to generate original IDs from produced filters
 
6:13 AM
I think the major problem here is that making queries of largest bitset intersections are computationally hard...
 
 
2 hours later…
7:55 AM
@xzczd That's strange. If you don't know how to pronounce "Mathematica", I think you don't know how to pronounce "Mathematics", or have you difficulties only with the "a" at the end of "Mathematica" ?
In any case don't pronounce "Matlab" (like my previous chief)
 
8:26 AM
@andre314 I can mimic Stephen's pronunciation of course, I'm just looking for an official clarification here :) .
@andre314 Oh there do exist a (surprising) amount of people mixing up Mathematica, MATLAB, Maple and even C…
 
I guess that the more a expression is short the more it remain in collective memory. Or may be the word "Mathematics" recall some so bad experience in scholarity (in France there have been some excess with the Bourbaki influence in the 70s) that people prefer to reject it.
 
9:05 AM
@andre314, thanks for your thoughts. I can not respond now but will respond in a few days.
 
9:23 AM
@user21 you may feel free not to answer. No problem.
 
10:09 AM
Hello! I am running a script from a terminal. How can I prevent the use of parallel kernels? When I monitor the CPU usage it goes up to 400-500 % which I interpret as Mathematica using parallel kernels.

I am interested to prevent this because I think those kernels will use up multiple floating licenses.
 
10:55 AM
I tried to include "SetSystemOptions["ParallelOptions" -> "ParallelThreadNumber" -> 1]" in the beginning of the code but it doesn't change the CPU usage going to multiple hundreds of %
 
 
1 hour later…
12:03 PM
@Szabolcs Thanks.
 
 
1 hour later…
1:16 PM
I have an upright cone being cut in half by a plane:
Does the two parts have official names? Cone segment?
 
1:47 PM
@Kiro There's a difference between parallel kernels and multi-threaded code in Mathematica: Many operations automatically use multiple threads to speed up computation, such as matrix multiplication, mapping of simple functions over lists, etc. All this implicit parallelization is mostly invisible to the end user and does not use additional licenses.
Actual parallel kernels are (almost) only started via the Parallel* style functions (where you also get the "Starting parallel kernels" message), and only these use extra license slots. See also $KernelCount to query the amount of currently active parallel kernels
 
@LukasLang Ah, good to know! Thanks for the reply.
 
2:38 PM
@Silvia Yes, they do: It's "Upper half of the upright cone that Sivlia cut" :)
In mathematics, a conic section (or simply conic) is a curve obtained as the intersection of the surface of a cone with a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, though historically it was sometimes called a fourth type. The ancient Greek mathematicians studied conic sections, culminating around 200 BC with Apollonius of Perga's systematic work on their properties. The conic sections in the Euclidean plane have various distinguishing properties, many of which can be used as alternative definitions. One...
 
2:51 PM
@halirutan Thanks :) I saw that wiki page. But as I understand it refers to only the ellipse? I'm trying to find a good name for my function, which takes a cone and a plane as input, outputs the top red segment.
And I'm surprised to find FilledCurve not working in 3D mode.
 
3:09 PM
@Silvia Yes. I thought there might be some further clues in there, but apparently not.
 
@halirutan Thanks anyway! As I may generalize the function to scenario where a cone is cut by N planes, I guess I will name it ConeFragment for now.
 
3:24 PM
@Silvia I went out to embarrass myself on math.SE and asked in their chat :) But they are talking about Lie groups and Riemann manifolds.. I guess that's beneath them.
 
@halirutan I guess my cone is from B.C. era while theirs are from Star Trek! :D
 
@Silvia Yep, most likely.
 
The newly added xxxShading functions are really nice. Today I found they (at least StippleShading that I tried) are even supported in the Cloud notebook!
The rendering speed is not bad.
 
 
3 hours later…
 
2 hours later…
8:10 PM
posted on April 07, 2020

Science & Technology

 
9:03 PM
I am not very familiar with the processes framework: reference.wolfram.com/language/guide/RandomProcesses.html
Is it possible to construct something like a RandomWalkProcess, but with an arbitrary step size distribution?
I mean create a valid process on which the usual process-operations will work.
With distributions, there is a lot of flexibility to create new distributions either based on existing ones, or from scratch
 
 
3 hours later…
11:36 PM
@JasonB. FYI my point group set printed nicely. Eight are directly from the curated data set and four I had to pull from other sources, but was able to scale all of them very nicely.
 

« first day (3002 days earlier)      last day (51 days later) »