Apologies, mis-fire. Anyway, So I can solve the system easily using matlab, etc. And so my question is most clearly:
How do I compute the exponential of a matrix easily in deal.ii, with the least amount of fuss (I can't find a function in the documentation that does this)? Or if that's too vague, ... How do I go about using the expm subroutine from LAPACK in my deal.ii code? Many thanks, Craig On Wed, Mar 23, 2011 at 2:43 PM, pleramorphyllactic < [email protected]> wrote: > Thanks guys, > > I think my wording belies my understanding of the problem somehow. I have > a very large deal.ii code that solves a highly nonlinear multicomponent PDE, > and is working quite well. I do know how to do what I need in matlab, and > a number fo different software. For example, I can exponentiate a matrix in > LAPACK, though have never h > > My question is onl > > > On Wed, Mar 23, 2011 at 2:29 PM, Markus Bürg <[email protected]> wrote: > >> Hello Evan, >> >> deal.II is a finite element library and does only support the basic linear >> algebra operations for matrices. Perhabs you want to use MATLAB or some >> other mathematics package, which already has support for such stuff like >> matrix exponentials. >> >> Best Regards, >> Markus >> >> >> >> Am 23.03.11 19:50, schrieb pleramorphyllactic: >> >> Hi all, >> >> Hope this isn't too simple of a question. I have a coupled system of >> Linear ODEs, and want to solve in deal.ii. So, >> say I have >> >> x' = Ax, >> >> where x is a state vector and A is a matrix. The simple way (that occurs >> to me) is doing matrix exponentiation, so finding: x = exp(At) * x_{0} . Is >> matrix exponentiation supported? ... and/or if not, does anyone have an >> easy/fast way you might approach this issue? >> >> Thanks a ton, >> Evan >> >> >> _______________________________________________ >> dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii >> >> >> _______________________________________________ >> dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii >> >> >
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