Helly-type theorems for spheres
โ Scribed by Hiroshi Maehara
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 359 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0179-5376
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
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
Let P be a family of simple polygons in the plane. If every three (not necessarily distinct) members of P have a simply connected union and every two members of P have a nonempty intersection, then N{P:P in P) ยข ยข. Applying the result to a finite family C of orthogonally convex polygons, the set fq{