2nd smallest Eigenvalue of sparse symmetric matrix

2nd smallest Eigenvalue of sparse symmetric matrix

Hi,
I need to find the 2nd smallest eigenvalue and corresponding eigenvector of a large sparse real symmetric matrix.
The matrix is stored in CSR format. I see that SSYEVX function does the
required work, but the zeros entries in the matrix also has to be
stored. Is there any other function which does my work..? or any other
suggestions please.

Regards,
Kiran.

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Hi kiran,there are no such functionsfor this type of matrices.--Gennady

Hi Gennady,
Not for CSR format but are there any functions to find the second smallest eigenvector of a sparse symmetric real matrix stored in any format.

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