Uniqueness theorems for variational problems by method of transformation groups
Wolfgang Reichel
A classical problem in the calculus of variations is theinvestigation of critical points of functionals {\cal L} on normedspaces V. The present work addresses the question: Under whatconditions on the functional {\cal L} and the underlying space V does{\cal L} have at most one critical point? A sufficient condition foruniqueness is given: the presence of a
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