Finite SAGBI bases for polynomial invariants of conjugates of alternating groups
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Abstract:
It is well-known, that the ring $\mathbb {C}[X_1,\dotsc ,X_n]^{A_n}$ of polynomial invariants of the alternating group $A_n$ has no finite SAGBI basis with respect to the lexicographical order for any number of variables $n \ge 3$. This note proves the existence of a nonsingular matrix $\delta _n \in GL(n,\mathbb {C})$ such that the ring of polynomial invariants $\mathbb {C}[X_1,\dotsc ,X_n]^{A_n^{\delta _n}}$, where $A_n^{\delta _n}$ denotes the conjugate of $A_n$ with respect to $\delta _n$, has a finite SAGBI basis for any $n \geq 3$.References
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Additional Information
- Manfred Göbel
- Affiliation: Dettenbachstraße 16, 94154 Neukirchen vorm Wald, Germany
- Email: goebel@informatik.uni-tuebingen.de
- Received by editor(s): September 7, 1999
- Received by editor(s) in revised form: July 19, 2000
- Published electronically: October 25, 2001
- © Copyright 2001 American Mathematical Society
- Journal: Math. Comp. 71 (2002), 761-765
- MSC (2000): Primary 13A50, 12Y05; Secondary 20B35, 14Q99
- DOI: https://doi.org/10.1090/S0025-5718-01-01405-3
- MathSciNet review: 1885626