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    A-approximate point spectrum of A-bounded operators in semi-Hilbertian spaces
    (Indian National Science Academy, 2025) Majumdar, A.; Johnson, P.
    The paper delves into several characterizations of A-approximate point spectrum of A-bounded operators acting on a complex semi-Hilbertian space H and also investigates properties of the A-approximate point spectrum for the tensor product of two A12-adjoint operators. Furthermore, several properties of A-normal operators have been established. © The Indian National Science Academy 2025.