On Bounds for the k-Partitioning of Graphs

Let an edge cut partition the vertex set of a graph into k disjoint subsets A1, ..., Ak with ||Ai|-|Aj|| ≤ 1. We consider the problem of determining the minimal size of such a cut for a given graph. For this we introduce a new lower bound method which is based on the solution of an extremal set problem and present bounds for some graph classes based on Hamming graphs.