The paper gives a complete characterization of existence and uniqueness for normalized solutions and energy ground states in doubly nonlinear defocusing NLS equations with focusing δ-type point interactions, for all nonlinearity powers.
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Normalized solutions of one-dimensional defocusing NLS equations with nonlinear point interactions
The paper gives a complete characterization of existence and uniqueness for normalized solutions and energy ground states in doubly nonlinear defocusing NLS equations with focusing δ-type point interactions, for all nonlinearity powers.