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- W2556341043 abstract "According to the literature, the S-expansion procedure involving a finite semigroup is valid no matter what the structure of the original Lie (super)algebra is; However, when something about the structure of the starting (super)algebra is known and when certain particular conditions are met, the S-expansion method (with its features of resonance and reduction) is able not only to lead to several kinds of expanded (super)algebras, but also to reproduce the effects of the standard as well as the generalized Inonu-Wigner contraction. In the present paper, we propose a new prescription for S-expansion, involving an infinite abelian semigroup $S^{(infty)}$ and the subtraction of an infinite ideal subalgebra. We show that the subtraction of the infinite ideal subalgebra corresponds to a reduction. Our approach is a generalization of the finite S-expansion procedure presented in the literature, and it offers an alternative view of the generalized Inonu-Wigner contraction. We then show how to write the invariant tensors of the target (super)algebras in terms of those of the starting ones in the infinite S-expansion context presented in this work. We also give some interesting examples of application on algebras and superalgebras." @default.
- W2556341043 created "2016-11-30" @default.
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- W2556341043 date "2016-11-17" @default.
- W2556341043 modified "2023-09-27" @default.
- W2556341043 title "Generalized Inonu-Wigner Contraction as $S$-Expansion with Infinite Semigroup and Ideal Subtraction" @default.
- W2556341043 hasPublicationYear "2016" @default.
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