Lusternik-Schnirelman Theory and Multiple Periodic Solutions with Fixed Energy
When a function has some symmetry properties, one can expect to obtain more precise information on the set of critical points by using, in the minimax approach, correspondingly symmetric sets which are distinguished by a measure of their “size” given by an index theory.
KeywordsPeriodic Orbit Fredholm Operator Bifurcation Theory Nonlinear Eigenvalue Problem Bibliographical Note
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