Wolfram Mathematica

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1:42 AM

The votes indicate that the community considers the version with the ampersand and without "the" as their favourite new header image. I present here the polished versions for the main- and meta-logo. The images of the logo are rasterized in the size in which they will appear on most screens. For...

discussion

5 hours later…

andre314

6:38 AM

Folks, How would you call an ragged array in which all leaves are at the same level. For example the simplest form of such an array is {{1},{2,3}} (as opposed to {1,{2,3}}, {{1},{{2},{3}} ...) ?

(I'm looking for a short expression.)

(The question could also concern Association)

maybe : ?? One Depth Object ??

?? Uniform Depth Object ??

By the way, I find the term "leaves" inappropriate, here I mean "integers", maybe "atomic" (relative to kind of array) would be better.

andre314

7:09 AM

Of course, If there is a established terminology I could refer, it would be ideal.

C. E.

7:43 AM

@andre314 By analogy to a balanced tree structure, perhaps we can call it a balanced expression?

Or even better (by the same analogy), "perfectly balanced expression".

Carl Lange

8:17 AM

I don't really know anything about graphs, but every time I want to use one in WL I find that the documentation is a bit undercooked. If you're a beginner in neural networks or image processing you can get really far with just the WL docs. Not so for graphs, in my opinion

2 hours later…

Carl Lange

10:14 AM

@Szabolcs You've done a really brilliant job with IGraph/M. The documentation is superb

1 hour later…

zhk

11:41 AM

Hi everyone,
while trying to solve a system PDE's, NDSolve takes so long to produce any output. I haven't seen any output yet,

pde1[Ha1_, M1_, L1_, a1_] =
u[x, y, z] D[u[x, y, z], {x, 1}] +
v[x, y, z] D[u[x, y, z], {y, 1}] +
w[x, y, z] D[u[x, y, z], {z, 1}] + 2*a1*M1*w[x, y, z] ==
D[u[x, y, z], {x, 2}] + D[u[x, y, z], {y, 2}] +
D[u[x, y, z], {z, 2}] - M1*(Ha1 + L1)*u[x, y, z];

pde2[M1_, L1_] =
u[x, y, z] D[v[x, y, z], {x, 1}] +
v[x, y, z] D[v[x, y, z], {y, 1}] +
w[x, y, z] D[v[x, y, z], {z, 1}] ==

2 hours later…