[petsc-users] computing matrix exponentials

[Jed Brown]

amlan barua <abarua at iit.edu> writes:

> Hi Jose,
> Thanks for the clarification. So if I want to compute the exponential
> matrix just once then I should extract the columns one by one and store
> them in a PetSc matrix.

Normally when people talk about efficient/scalable methods for matrix
exponential, they mean evaluating

  y = exp(A*t) * x

rather than computing the full matrix exp(A*t).  Which do you want?
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