hypergraph
A generalization of Vizing's Theorem? ★★
Author(s): Rosenfeld
Conjecture Let be a simple -uniform hypergraph, and assume that every set of points is contained in at most edges. Then there exists an -edge-coloring so that any two edges which share vertices have distinct colors.
Keywords: edge-coloring; hypergraph; Vizing
Ryser's conjecture ★★★
Author(s): Ryser
Conjecture Let be an -uniform -partite hypergraph. If is the maximum number of pairwise disjoint edges in , and is the size of the smallest set of vertices which meets every edge, then .
Keywords: hypergraph; matching; packing