[petsc-users] Calculating inertias

[Perceval Desforges]

Dear petsc developers, 

I am interested in calculating the inertias of matrixes. Specifically,
for a certain matrix A, and for different real numbers E, I want to
calculate the inertias of (A - E * I), in order to get the number of
eigenvalues less than E.  

In order to do this I have been setting up a slepc EPS object with
spectrum slicing, and using EPSKrylovSchurGetInertias. I realize this is
a bit convoluted, and was wondering if there is a better way to do this?


Best regards, 

Perceval, 

P.S. my last email seems to not have been sent (I couldn't find it in
the archives) so I am trying again...
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20200324/8106a138/attachment-0001.html>