[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: MatZeroColsIS question.

To: petsc-users@xxxxxxxxxxx
Subject: Re: MatZeroColsIS question.
From: Peter Schröder <ps@xxxxxxxxxxxxxx>
Date: Tue, 04 Sep 2007 06:01:50 -0700
In-reply-to: <20070904140845.3369ea22@rav.ippt.gov.pl>
Organization: Caltech Multi-Res Modeling Group
References: <20070904140845.3369ea22@rav.ippt.gov.pl>
Reply-to: petsc-users@xxxxxxxxxxx
Sender: owner-petsc-users@xxxxxxxxxxx
User-agent: Thunderbird 2.0.0.6 (Windows/20070728)

Why not just construct the matrix without the corresponding columns and rows? That preserves the symmetry (as it should of course), gives you a smaller matrix, and you don't have the hassle with the zero columns.

Peter

Follow-Ups:
- Re: MatZeroColsIS question.
  - From: Lisandro Dalcin

References:
- MatZeroColsIS question.
  - From: Toby D. Young

Prev by Date: MatZeroColsIS question.
Next by Date: incomplete LU with drop tolerance
Previous by thread: MatZeroColsIS question.
Next by thread: Re: MatZeroColsIS question.
Index(es):
- Date
- Thread