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user21

 Wolfram Mathematica

Welcome! This is the main Mathematica chat room for mathematic...
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user21
yst 15:01
@Nasser You x-axis has month and not year, how to interpret that? Perhaps a year graph were more representative.
user21
Fri 06:58
@C.E., thanks again. Appreciated.
user21
Thu 09:21
@C.E. thanks for taking care of this delicate matter.
user21
Thu 09:21
I'd still suggest the avatar be changed such that the billiard ball is recognized as such, for example by changing the font of the 11.
user21
Thu 09:19
Did anyone recognize this as a billiard ball? I think we should be very careful here, because this is a methodology used by fascists (I am not saying the persons is): They use symbols that are similar enough to be recolonized as Nazi symbols and when you ask they claim it's something else. I don't like it.
user21
Feb 12 10:21
A change in color and/or a different font might already provide enough difference. I think it's important in today's times where racism and fascism are en vogue again (unbelievable!) to work against this by education.
user21
Feb 12 10:21
@C.E. @xzczd @bmf when I looked for 11 symbols nothing came up that looked vaguely similar to the users avatar. It might very well be that the user is not aware of the relation to nazi symbolism. I'd think it would be good to contact the user about that and make them aware that this is somewhat problematic.
user21
Aug 21, 2024 11:28
@Szabolcs, applologies for the late answer. I did see it but forgot. Unfortunately, the answer is: I don't know.
user21
Aug 2, 2024 04:59
Another source of information: community.wolfram.com/groups/-/m/t/3238233
user21
Aug 2, 2024 04:59
Here is a heads up: When you install 14.1 it might be useful to know about the new path for packages, stylesheets etc: reference.wolfram.com/language/tutorial/…
user21
Feb 23, 2024 08:42
So the text does indeed restrict it to a list of countries, but I'd try anyways. The only constellation that currently does not work, afaIk, is working remotely from China.
user21
Feb 23, 2024 08:39
@bmf I must apologize. When I discussed this position with HR there was no mention of that restriction and I made the mistake of just copy and pasting the link. This restriction is unfortunate and certainly not what I had in mind. If someone reads this that is interested in this position and is from a country that is not listed - apply anyways. Apologies once more. My bad.
user21
Feb 22, 2024 10:02
@xzczd the statement from bmf suggests something that I think is not correct. I do not know where he got this information from.
user21
Feb 22, 2024 08:04
@bmf, that job is open any nationality. What makes you say that it would not open to certain nationalities? What you probably refer to is that you can not remote work from certain countries but that is something different than saying it's not open to certain nationalities. For example, you currently can not remote work from China regardless of whether you are Chinese, or, say, German.
user21
Feb 21, 2024 07:52
There is a new opening for a developer for neural nets to solve PDEs.
user21
Jan 30, 2024 07:33
If you are interested in working on PDE models for electromagnetism, we have a new PDE developer opening here. have a look and/or pass along to people that might be interested. Thanks.
user21
Jan 29, 2024 08:11
In case any one is interested, we host a Finite Element Colloquium. It's on the 29th of Feb 2024.
user21
Jan 16, 2024 09:57
@andre314 to the best of my knowledge they have not been published.
user21
Dec 7, 2023 08:48
@IstvánZachar, if you have trouble with getting Gurobi to run, please contact the support.
user21
Sep 15, 2023 14:53
@rm-rf, thanks. That's not the one - I must be imaging things. Thanks for looking, much appreciated!
user21
Sep 15, 2023 07:30
@bmf, thx never the less
user21
Sep 15, 2023 06:09
I think to remember that I had seen a polygon (triangle) reduction algorithm somewhere here. But I can not find it. What I am looking for is a post where a mesh with a certain mesh cell count was reduced by merging cells. Maybe I am imagining things, or does anyone else remember the post and can point me to it? Thx.
user21
Jun 5, 2023 08:57
@psimeson I am certainly no DSolve expert. Why don't you post that as a regular question.
user21
May 4, 2023 08:06
For those of you that might wonder what I do at Wolfram Research here is a picturesque version of if ;-) wolfram.com/language/core-areas/finite-element-method hopefully useful to pass on to people that enquirer about FEM and PDE modeling.
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user21
Mar 21, 2023 08:35
@MichaelE2 we are gearing up for a no tool: NoChatGPT....
user21
Jan 19, 2023 08:54
@CarlLange, thanks.
user21
Jan 18, 2023 07:36
@Nasser, thinking of Mathematica as a CAS is a bit, how to say, old fashioned. No?
user21
Jan 17, 2023 17:03
@rhermans, I see. It's a company and I can imagine that not everyone is happy.
user21
Jan 17, 2023 16:56
@rhermans, I work for WRI as a consultant and have not been treated badly and I am also happy with my compensation.
user21
Jan 17, 2023 13:51
@CarlLange, is there anything specific about the license agreement to puts your clients off - is it too expensive or something else?
user21
Jan 17, 2023 13:46
@tush apply at Wolfram Research.
user21
Jan 4, 2023 14:30
@imbAF, same as any expression. For example: f[g_]:=g[0]; f[Sin]
user21
Jan 4, 2023 09:21
Happy New Year everyone. I'd like point to a new FrontEnd feature, that I think is very useful. Consider this code `NDSolveValue[{Laplacian[u[x, y], {x, y}] == 1},
u[x, y], {x, y} \[Element] Disk[]]` that returns three messages. At the end of the first two messages you will see a blue circle-i. That circle-i is only present **iff** there is a message reference page. So if you run into trouble and get messages, you can click on that circle-i and it will take you to the message reference page. There you should find information on how to fix the issue at hand. I hope other find this useful too.
user21
Dec 2, 2022 07:12
Numerics Course Developer: wolfram.com/company/careers/opportunities/…
user21
Dec 2, 2022 07:12
Physics Application Developer: wolfram.com/company/careers/opportunities/…
user21
Dec 2, 2022 07:11
Hey everyone. I have two open internships in the numerics group available. If you know an appropriate candidate please forward the descriptions of the positions to them. Much appreciated
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 Discussion on question by Igor Koteln…

Imported from a comment discussion on mathematica.stackexchang...
user21
Feb 15, 2023 10:20
Go, to the ToElementMesh ref page and look in the options for MeshRefinementFucntion.
user21
Feb 15, 2023 10:20
I still do not understand anything, but have you tried to refine the mesh in that area to at least contain the oscillations?
user21
Feb 15, 2023 10:20
To me it's not exactly clear the what the problem is and especially what you expect.
 

 Discussion on answer by Ulrich Neuman…

Imported from a comment discussion on mathematica.stackexchang...
user21
Dec 8, 2022 09:44
@xzczd, hm I don't know. perhaps this has something to do with the fact that the disk is rationally symmetric. But this is really a shot in the blue. Sorry I don't know.
user21
Dec 8, 2022 09:44
@xzczd, the only think I wanted to show with my comment is how to include a point inside the domain and how to address that point from a DirichletCondition. I am not claiming it solves any of these problems, I am just showing the technique.
user21
Dec 8, 2022 09:44
@TeM, have a look in the ToElementMesh ref page under the options section.
user21
Dec 8, 2022 09:44
If you want to include a Dirichlet Condition inside the domain. Use ToElementMesh an set IncludePoints -> {0, 0} then you address that point in the DC.
 

 Discussion between Tschibi and user21

Imported from a comment discussion on mathematica.stackexchang...
user21
Sep 9, 2022 08:46
@xzczd, thanks for the link to the paper. I'll dive deeper into this once I do electro magnetics as a filed of physics for the PDEModels.
user21
Sep 8, 2022 12:09
@Tschibi, I suppose you have to ping them under an answer with a @ and give them this link. I don't know if there are other ways to do it
user21
Sep 8, 2022 05:23
I am living and working in Germany; I work for Wolfram Research and I am the developer of the FEM in Mathematica.
user21
Sep 8, 2022 05:21
I would be important to establish which equations we want to solve.
user21
Sep 8, 2022 05:21
Go ahead and invite Alex. I think another person to invite is xzczd who actually came up with the UnitStep -> appro idea.
user21
Sep 7, 2022 13:36
I did see that post and I am trying to understand better what the issue is. Would it help if you had a representation of Curl[ mu[x,y,z] Curl[{Ax[x,y,z], Ay[x,y,z], Az[x,y,z]}, {x,y,z}],{x,y,z}]?
user21
Sep 7, 2022 13:33
I still struggle with what this UnitStep->appro business does.....