We study a variant of the greedy algorithm for weight functions defined on the system of subsets of a given finite set E and show that this algorithm works exactly for "valuated DELTA-matroids." Examples come from valuation theory.
机构:
Kyoto Univ, Math Sci Res Inst, Kyoto 6068502, Japan
UJF, CNRS, Grenoble INP, Lab G SCOP, F-38031 Grenoble, FranceKyoto Univ, Math Sci Res Inst, Kyoto 6068502, Japan