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asymptotically linear Schrödinger equation
Multiple solutions of
nonlinear boundary value problems for two-dimensional differential
systems
This paper discusses the quasilinearization process, that is,
reduction of a given boundary value problem to a quasi-linear one.
Quasi-linear BVP has a solution of definite type which is induced
by oscillatory properties of the linear part of a system.
Conditions are given for a solution of a modified (quasi-linear)
BVP to satisfy also the original problem. It is shown that
multiple quasilinearizations with different linear parts if
possible lead to multiple solutions.