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                                       Details for article 5 of 9 found articles
 
 
  Full transversal matroids, strict gammoids, and the matroid components problem
 
 
Title: Full transversal matroids, strict gammoids, and the matroid components problem
Author: Mummy, Mark Stephen
Appeared in: Linear & multilinear algebra
Paging: Volume 19 (1986) nr. 2 pages 97-116
Year: 1986-04
Contents: We provide two algorithms for finding dependence graphs both in a full transversal matroid and in its dual, a strict gammoid. The first algorithm is based on directed paths in the directed graph associated with a strict gammoid; its complexity is O(|L|(|V-L|+|E|)), where L is the link-set of the gammoid. The second algorithm is based on a special property of Gaussian elimination in a matrix of indeterminates representing a full transversal matroid; it complexity is o(m2n), where m is the rank of the matroid and n the cardinality of the underlying set. We provide an algorithm for listing all bases in, and calculating the Whitney and Tutte polynomials for, a full transversal matroid or a strict gammoid. The complexity of this algorithm is 0(N(n-m) (|E| + m2)), where N is the number of bases.
Publisher: Taylor & Francis
Source file: Elektronische Wetenschappelijke Tijdschriften
 
 

                             Details for article 5 of 9 found articles
 
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