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b3m2a1
b3m2a1
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
 
CA Trevillian
CA Trevillian
2:08 AM
@b3m2a1 at least it looks nice and in-focus while it freezes? D;
 
 
2 hours later…
xzczd
xzczd
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.
 
Silvia
Silvia
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?
 
kirma
kirma
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
 
kirma
kirma
6:13 AM
I think the major problem here is that making queries of largest bitset intersections are computationally hard...
 
 
2 hours later…
andre314
andre314
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)
 
xzczd
xzczd
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…
 
andre314
andre314
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.
 
user21
user21
9:05 AM
@andre314, thanks for your thoughts. I can not respond now but will respond in a few days.
 
andre314
andre314
9:23 AM
@user21 you may feel free not to answer. No problem.
 
Kiro
Kiro
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.
 
Kiro
Kiro
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…
István Zachar
István Zachar
12:03 PM
@Szabolcs Thanks.
 
 
1 hour later…
Silvia
Silvia
1:16 PM
I have an upright cone being cut in half by a plane:
Does the two parts have official names? Cone segment?
 
Lukas Lang
Lukas Lang
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
 
Kiro
Kiro
@LukasLang Ah, good to know! Thanks for the reply.
 
halirutan
halirutan
2:38 PM
@Silvia Yes, they do: It's "Upper half of the upright cone that Sivlia cut" :)
Conic section
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...
 
Silvia
Silvia
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.
 
halirutan
halirutan
3:09 PM
@Silvia Yes. I thought there might be some further clues in there, but apparently not.
 
Silvia
Silvia
@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.
 
halirutan
halirutan
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.
 
Silvia
Silvia
@halirutan I guess my cone is from B.C. era while theirs are from Star Trek! :D
 
halirutan
halirutan
@Silvia Yep, most likely.
 
Silvia
Silvia
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…
Feeds
Feeds
6:35 PM
 
 
2 hours later…
Feeds
Feeds
8:10 PM
Stephen_Wolfram's Twitch video RSS: Science & Technology Q&A - LIVE
posted on April 07, 2020

Science & Technology

 
Szabolcs
Szabolcs
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…
bobthechemist
bobthechemist
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.
 

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