Helly-type theorems about sets
β
Steve Fisk; Daniel Abbw-Jackson; Dan Kleitman
π
Article
π
1980
π
Elsevier Science
π
English
β 724 KB
Suppose that G ifn a graph. A l-factor is a set of edges of G such that every vertex of G meets exactly one of its edges. Suppose that we have a set Y of l-factors of G such that any two l-factors vf Y have an edge in common. We investigate the following questions: (1) How large may Y be? (2) When