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math.CO1998
Algebras related to matroids represented in characteristic zero
David G. Wagner
Let k be a field of characteristic zero. We consider graded subalgebras A of k[x_1,...,x_m]/(x_1^2,...,x_m^2) generated by d linearly independant linear forms. Representations of m…
math.CO1998
The algebra of flows in graphs
David G. Wagner
We define a contravariant functor K from the category of finite graphs and graph morphisms to the category of finitely generated graded abelian groups and homomorphisms. For a grap…
math.CO1998
Zeros of reliability polynomials and f-vectors of matroids
David G. Wagner
For a finite multigraph G, the reliability function of G is the probability R_G(q) that if each edge of G is deleted independantly with probability q then the remaining edges of G…