We study a decomposition of Fl n d-1 , where Fl n denotes the flag manifold over n . The strata are defined by the dimensions of intersections of one space from each flag, so for d equal to 2 this is the usual Bruhat cell decomposition. The strata are indexed by "permutation arrays," which are d-dim
A construction for equidistant permutation arrays of index one
β Scribed by S.A Vanstone; P.J Schellenberg
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 361 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0097-3165
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π SIMILAR VOLUMES
This note presents a detailed analysis and a constructive combinatorial description of SAGBI bases for the R-algebra of G-invariant polynomials. Our main result is a ground ring independent characterization of all rings of polynomial invariants of permutation groups G having a finite SAGBI basis.
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