[petsc-users] KSP solver always has Zero pivot in LU

[Sharp Stone]

Dear All,

Last week I raised a question about KSP solver with zero pivot problem. Now
I downsized the matrix in my problem and still got the zero pivot problem.
I looked at the matrix and computed its eigenvalues in matlab, and it seems
the matrix is good (not singular, I mean), but petsc still reported zero
pivot in LU factorization. What could possibly cause this? Thank you very
much in advance!

PS: I attached the matrix output in my simplest test.

-- 
Best regards,

Feng
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