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[<davidmlove86@hotmail.com>]

Hi,

I am generating a matrix Hamiltonian over different Bloch states. When
integrating over different bands I roughly obtain the expected result, i.e.
identity matrix to the accuracy of about 1e-5.

However when solving <nk|nk'> my off diagonals are not near 0 (i.e. 1e-1) when
the values of k and k' are close. Theoretically states across different k
should be orthogonal. Is this definitely also the case in abinit? Has anybody
ever had similar problems?

Thank you.
David