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On inverse spectral problem and generalized Sturm nodal theorem for nonlinear boundary value problems
In the present paper, we are concerned with the Sturm-Liouville operator ℒ[] := - ′′ + () subject to the separated boundary conditions.We suppose that ∈ 2 (0, ) and study a so-called inverse optimization spectral problem: given a potential 0 and a value , where = 1, 2, . …