JOURNAL OF FUNCTION SPACES AND APPLICATIONS, 2013 (SCI İndekslerine Giren Dergi)
We consider on an appropriate Sobolev space a non-Hermitian Hamiltonian H-alpha,H-beta depending on the two complex parameters alpha and beta and having real spectrum. We derive a closed formula for a family of the metric operators, which render the Hamiltonian H-alpha,H-beta Hermitian. In some particular cases, we calculate the Hermitian counterpart of H-alpha,H-beta.