Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4647931 | Discrete Mathematics | 2012 | 5 Pages |
Abstract
Recently the invariant (copoint) pre-hull number ph(G) of a graph GG that measures the nonconvexity of a convex space was introduced inĀ [15]. We introduce a similar invariant called the convex pre-hull number which is a natural upper bound for the copoint pre-hull number and consider in this work both on the lexicographic product of graphs. We present exact values with respect to properties of the factors.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Discrete Mathematics and Combinatorics
Authors
Iztok Peterin,