Title
On inequivalent representations of matroids over non-prime fields
Abstract
For each finite field F of prime order there is a constant c such that every 4-connected matroid has at most c inequivalent representations over F. We had hoped that this would extend to all finite fields, however, it was not to be. The (m,n)-mace is the matroid obtained by adding a point freely to M(Km,n). For all n⩾3, the (3,n)-mace is 4-connected and has at least 2n representations over any field F of non-prime order q⩾9. More generally, for n⩾m, the (m,n)-mace is vertically (m+1)-connected and has at least 2n inequivalent representations over any finite field of non-prime order q⩾mm.
Year
DOI
Venue
2010
10.1016/j.jctb.2010.08.001
Journal of Combinatorial Theory, Series B
Keywords
Field
DocType
Matroids,Inequivalent representations,Connectivity
Prime (order theory),Matroid,Combinatorics,Finite field,Conjecture,Mathematics
Journal
Volume
Issue
ISSN
100
6
0095-8956
Citations 
PageRank 
References 
23
1.90
0
Authors
3
Name
Order
Citations
PageRank
James Oxley139757.57
Dirk Vertigan233132.14
geoff whittle3231.90