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- W2037504856 abstract "Let A=(Avw:v, w∈V) be a symmetric binary matrix. For W⊆V, let A[W]= (Avw:v, w∈W). The set F={W:W⊆V, A[W] has an inverse or W=⊘} satisfies the following symmetric exchange axiom (SEA): for F′, F″∈F, for x∈F′△F″, there exists y∈F′△F″ such that F′△{x, y}∈F. A △-matroid is a pair (V, F) with a finite set V and ⊘≠F⊆P(V) satisfying (SEA). We characterize those △-matroids which can be obtained, as above, by means of a symmetric binary matrix." @default.
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- W2037504856 date "1991-02-01" @default.
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- W2037504856 title "Representability of △-matroids over GF(2)" @default.
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- W2037504856 doi "https://doi.org/10.1016/0024-3795(91)90020-w" @default.
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