Uniqueness Theorems for Variational Problems by the Method of Transformation Groups
Häftad, Engelska, 2004
Del i serien Lecture Notes in Mathematics
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Beskrivning
A classical problem in the calculus of variations is the investigation of critical points of functionals {\cal L on normed spaces V. The present work addresses the question: Under what conditions on the functional {\cal L and the underlying space V does {\cal L have at most one critical point - A sufficient condition for uniqueness is given: the presence of a "variational sub-symmetry", i.e., a one-parameter group G of transformations of V, which strictly reduces the values of {\cal L. The "method of transformation groups" is applied to second-order elliptic boundary value problems on Riemannian manifolds. Further applications include problems of geometric analysis and elasticity.