Zobrazeno 1 - 10
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pro vyhledávání: '"Booth, Richard F."'
We introduce the concept of orientation for Lagrangian matroids represented in the flag variety of maximal isotropic subspaces of dimension N in the real vector space of dimension 2N+1. The paper continues the study started in math.CO/0209100.
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Externí odkaz:
http://arxiv.org/abs/math/0209217
Represented Coxeter matroids of types $C_n$ and $D_n$, that is, symplectic and orthogonal matroids arising from totally isotropic subspaces of symplectic or (even-dimensional) orthogonal spaces, may also be represented in buildings of type $C_n$ and
Externí odkaz:
http://arxiv.org/abs/math/0209100
Autor:
Booth, Richard F.
In this paper we extend the theory of oriented matroids to Lagrangian orthogonal matroids and their representations, and give a completely natural transformation from a representation of a classical oriented matroid to a representation of the same or
Externí odkaz:
http://arxiv.org/abs/math/0011060
In this paper we present a definition of oriented Lagrangian symplectic matroids and their representations. Classical concepts of orientation and this extension may both be thought of as stratifications of thin Schubert cells into unions of connected
Externí odkaz:
http://arxiv.org/abs/math/0010237
The aim of the paper is to clarify the nature of combinatorial structures associated with maps on closed compact surfaces. We prove that maps give rise to Lagrangian matroids representable in a setting provided by cohomology of the surface with punct
Externí odkaz:
http://arxiv.org/abs/math/0010236
Publikováno v:
In European Journal of Combinatorics 2005 26(7):1023-1032
Publikováno v:
In Discrete Mathematics 2003 266(1):109-118
Publikováno v:
In European Journal of Combinatorics July 2001 22(5):639-656
Autor:
Booth, Richard F.
Publikováno v:
In European Journal of Combinatorics July 2001 22(5):627-638
Publikováno v:
Journal of Occupational Psychology. Jun76, Vol. 49 Issue 2, p85-92. 8p.