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Block sparse matrix with repeated values

To: petsc-users@xxxxxxxxxxx
Subject: Block sparse matrix with repeated values
From: Tim Sears <tim.sears@xxxxxxxxxx>
Date: Mon, 8 Oct 2007 18:50:23 +1000
Reply-to: petsc-users@xxxxxxxxxxx
Sender: owner-petsc-users@xxxxxxxxxxx

I wish to perform the matrix-vector multiplication Ax, where A = (I 'kron' B), and B is a rectangular matrix. 'kron' is the Kronecker product of two matrices. Clearly A contains many repeated values. Is there a PETSC format that can store this matrix efficiently? If so how does one populate it? Cheers, --Tim

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