[petsc-users] PetscKernel_A_gets_inverse_A_4

Jed Brown jed at jedbrown.org
Thu Jan 22 16:00:35 CST 2015

Fande Kong <fd.kong at siat.ac.cn> writes:

> Hi all,
> I want to get the inverse of 4X4 matrix, and I found a function
> PetscKernel_A_gets_inverse_A_4 which possibly reaches my purpose. But there
> is a extra parameter 'shift'. What value should I use for the parameter
> 'shift'?

0 if your matrix is nonsingular.
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