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Using well-known methods we generalize (hyper)virial theorems to case ofsingular potential. Discussion is performed for most general second orderdifferential equation, which involves all physically interesting cases, asSchrodinger and Klein-Gordon equations with singular potentials. Some physicalconsequences are discussed. The connection with Feynman-Hellmann like theoremsare also considered and some relevant differences are underlined.

Generalization of Hypervirial and Feynman-Hellmann Theorems for Singular Potentials