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Re: DAE daspk solver problem

From: c.
Subject: Re: DAE daspk solver problem
Date: Sat, 29 Oct 2016 09:02:01 +0200

On 28 Oct 2016, at 19:17, SunilShah <address@hidden> wrote:

> For large scale problems, (> 1e5 variables), retaining sparsity is an
> important issue, so DASPK structure can offer some advantages.  Even when
> the equations can be symbolically transformed, symbolic manipulation may not
> scale well (perhaps the problem with scaling in Modelica),  or may destroy
> sparsity and therefore have inefficient discrete propagation.

Unfortunately the sparsity is not exploited in the Octave interface.

> Lastly, the fortran DASPK / DASKR can take advantage of implicit sparse
> solvers.  Do octave implementations allow this?

No, AFAIK there is no option in Octave to invoke the matrix-free iterative 
in DASPK from Octave.


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