[Trilinos-Users] How to solve Ax=bs with many righ hand sides vector.

[Boman, Erik G]

The Belos package has block Krylov solvers that can solve for several right hand sides (multivector). However, you need to have all the right hand sides ready at the same time.

Erik

From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of "Heroux, Mike" <MHeroux at CSBSJU.EDU>
Date: Thursday, October 22, 2020 at 2:24 PM
To: ztdepyahoo <ztdepyahoo at gmail.com>, "trilinos-users at trilinos.org" <trilinos-users at trilinos.org>
Subject: [EXTERNAL] Re: [Trilinos-Users] How to solve Ax=bs with many righ hand sides vector.

As I recall, it is hard to get Aztec to accept a new right hand side without having it recompute the setup phase.  However, it’s been 20 years since I last used it.

AztecOO works very similarly and permits separation of the setup from the solve.

From: Trilinos-Users <trilinos-users-bounces at trilinos.org> on behalf of ztdepyahoo <ztdepyahoo at gmail.com>
Date: Wednesday, October 21, 2020 at 11:30 PM
To: "trilinos-users at trilinos.org" <trilinos-users at trilinos.org>
Subject: [Trilinos-Users] How to solve Ax=bs with many righ hand sides vector.

I use Aztec to solve Ax=b for my CFD problem. and the matrix A is fixed, but vector b may change values.  So i want to know  how to solve Ax=bs with many righ hand sides in one turn.
Regards

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ztdepyahoo

ztdepyahoo at gmail.com

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