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Contractions and generalized Casimir invariants

Rutwig Campoamor-Stursberg

math.RAarXiv:math/0111185

Abstract

We prove that if g is a contraction of a Lie algebra g then the number of functionally independent invariants of g is at least that of g. This allows to determine explicitly the number of invariants of Lie algebras carrying a supplementary structure, such as linear contact or linear forms whose differential is symplectic.

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