A short survey of (r,q)-structures

A SHORT SURVEY OF (r,q) -STRUCTURES VOJTECH BÁLINT 1 Department of Mathematics, University of Žilina, 010 26

Žilina, Slovakia.

ABSTRACT. This contribution gives a short survey of results on the combinatorial (r,q)-structures as the generalization of many geometrical structures. Theorem 4 gives a new estimate.