[Pw_forum] Davidson diagonalization with overlap

[Cao TF]

Dear Giuseppe Mattioli
            Thank you very much for your kind replay .   When I  relax the structure, the calculation process stops here iteration #  4     ecut=    30.00 Ry     beta=0.70
  Davidson diagonalization with overlap. And I google it and have found this http://www.democritos.it/pipermail/pw_forum/2003-June/000374.html.
I can not fully understand it, so it appears to me that there in a problem in my calculation.

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