Intersecting families of convex cover orderm
β Scribed by Marilyn Breen
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 253 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0046-5755
No coin nor oath required. For personal study only.
β¦ Synopsis
Let S=cl(intS) be a subset of the plane, Q the set of points of local nonconvexity of S, Q finite, with p a point in (bdryS n ker S)~ Q. If ~ denotes the collection of all maximal families of wedges of S having convex cover order m, m> 1, then the members of Ad,( are characterized in the following manner: For Wo a wedge of S, Wo is in 0..~ Β’ if and only if for every Wo in Wo and every collection of points wl, ..., Wm in S, then [wi, ws]~S for at least one pair i,], O<<_i<j<m.
π SIMILAR VOLUMES
Suppose that any t members (t 2) of a regular family on an n element set have at least k common elements. It is proved that the largest member of the family has at least k 1Γt n 1&1Γt elements. The same holds for balanced families, which is a generalization of the regularity. The estimate is asympto