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visits member for 1 year, 9 months
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4h
revised Why is multidimensional Reverse slow?
added 66 characters in body
5h
comment PDE with Stefan Conditions, a.k.a variable boundary
@AlexeiBoulbitch I suppose that it's just a simple example for a equation with the moving boundary.
19h
comment PDE with Stefan Conditions, a.k.a variable boundary
@xzczd, yes, it is true! I just expanded the derivatives in this equation.
19h
comment Site - Cell Correspondence in Voronoi Diagram obtained via VoronoiMesh
@kguler, your solution is really nice, it's considerably faster then RunnyKine's and my (at least current uncompiled version) solutions.
20h
comment PDE with Stefan Conditions, a.k.a variable boundary
@xzczd u[ξ,t] obeys another equation (the first formula in the post). I have checked that resulting u[x,t] obeys the initial heat equation.
1d
comment Parallelizing sparse array construction
Try to use the common scheme: SparseArray[ids -> vals], where ids = {{i1,j1},{i2,j2},...} is a list of indexes and vals is a list of correcpoding values. You can calulate vals with ParallelTable. Moreover, adding elements to existing SparseArray takes sensible amount of time.
1d
revised Site - Cell Correspondence in Voronoi Diagram obtained via VoronoiMesh
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1d
comment Suggested Settings for Mathematica over X11/SSH Tunnel
Why you don't use remote kernel? It is much-much faster then GUI forwarding.
1d
answered PDE with Stefan Conditions, a.k.a variable boundary
2d
answered Site - Cell Correspondence in Voronoi Diagram obtained via VoronoiMesh
Aug
28
comment Splitting strings at lower case characters and numbers
+1 for @*, there is always something new to learn!
Aug
28
awarded  Necromancer
Aug
28
comment Splitting strings at lower case characters and numbers
@Mr.Wizard I also happy to join you again! When I try to correct my answer I come to your answer exactly. I propose another approach instead of deleting the post :)
Aug
28
revised Splitting strings at lower case characters and numbers
added 149 characters in body
Aug
28
answered Splitting strings at lower case characters and numbers
Aug
28
revised How can I connect to a remote machine?
added 382 characters in body
Aug
28
revised Unpacked eigenvectors of complex matrices
added 55 characters in body
Aug
16
awarded  Nice Answer
Jul
2
awarded  Curious
Jun
4
comment Why Refine does not simplify Cos[2*Pi*FractionalPart[1/2*(i + j + k)]] to $(-1)^{i+j+k}$?
@Mr.Wizard I'm sorry that I have no spare time to participate on this site now. I hope I'll be back in September or earlier. I was glad to talk with Leonid at the recent Wolfram conference in St. Petersburg.