Meaning of nbf ao .ne. nmo output during CDFT run?

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Hi I am new to NWchem and am trying to do some constrained DFT and am curious as to what the meaning of nbf_ao .ne. nmo is in the output file?


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nbf_ao Total number of Atomic Orbital basis functions
nmo Number of Molecular Orbitals
The two numbers differ when linear dependence is present.
nbf_ao - nmo = number of linear dependencies.

Details in 3.4.5 "Orthogonalization of the Basis" in Szabo Ostlund "Modern Quantum Chemistry"

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