[petsc-users] SLEPc Eigenvalue problem - Zero Pivot

[venkatesh g]

Dear All,

I am having a block matrix Eigenvalue problem AX = lambda BX

My B is singular, it is a block matrix and only one block has non-zero
values.

Matlab Eigs is giving the result.

I am using option: "./ex7 -f1 A1 -f2 B1 -st_type sinvert"

Result is: Detected zero pivot in LU factorization.

The ex7 is an example from SLEPc.

Pls advice what to do ?

cheers,
Venkatesh
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