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2m
reviewed Reviewed How to use ForAll to prove things about functions?
10h
comment Dynamic programming: Fibonacci generator
Not sure what you're trying to achieve here (and I'm sure there are better ways) but the problem may lie in your usage of i, j both as symbolic patterns in the second definition of A and as variables with values in the outer loop. It might be that removing the underscores in the second definition resolves the problem.
10h
comment ParametricPlot3D produces no output
Spot on, @m_goldberg
11h
reviewed Close Mathematica 10 cannot solve definite integral
11h
reviewed Close ParametricPlot3D produces no output
11h
comment ParametricPlot3D produces no output
@m_goldberg given the size of that page it may be good to be a little bit more specific and refer to the actual answer you have in mind.
12h
reviewed Close Integral does not converge (when it should)
12h
reviewed Leave Open Citation of the algorithms used in FindGraphCommunities
12h
comment Citation of the algorithms used in FindGraphCommunities
Following Szabolcs meta post I'd suggest to keep this question open.
12h
reviewed Reviewed How does $1\rightarrow A\rightarrow B\rightarrow C\rightarrow 1$ imply that $Im(f:B\rightarrow C)\cong B/A$?
14h
reviewed Approve modeling tag wiki excerpt
14h
comment Suggestions for solving a large linear system
In that case I would recommend throwing a bit of N over them as this may have a dramatic impact on speed and memory use. Have a look at LinearSolve as well.
14h
comment Suggestions for solving a large linear system
Would you mind if the rational coefficients were transformed to reals?
14h
answered create a table via menu-
15h
comment MatrixExp of a complex matrix of size about 10000 by 10000
You can do all operations you like on sparse arrays, but the advantage is that memory use can be significant less than standard arrays (depending on sparsity of course).
18h
reviewed Close MatrixExp of a complex matrix of size about 10000 by 10000
19h
reviewed Approve locator tag wiki
19h
reviewed Approve locator tag wiki excerpt
19h
comment MatrixExp of a complex matrix of size about 10000 by 10000
You still haven't answered most of the above questions. And with respect to sparse matrices: did you use SparseArray? And how sparse is your sparse matrix?
23h
comment MatrixExp of a complex matrix of size about 10000 by 10000
What type of numbers are in the matrix? Integers, machine precision reals or arbitrary precision numbers?