Bifurcation for variational problems when the linearisation has no eigenvalues. (English) Zbl 0458.47048


47J05 Equations involving nonlinear operators (general)
35B32 Bifurcations in context of PDEs
35Q99 Partial differential equations of mathematical physics and other areas of application
81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics
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