scalapack pdsyev routine did not converge

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scalapack pdsyev routine did not converge

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I use pdsyev routine compute a large dimension (70000*70000) matrix, however the INFO of pdsyev is greater than zero(INFO =35612), which means the 35612th engenvalue did not converge. How to solve this problem?

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scalapack pdsyev routine did not converge

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