During my long life I published many papers with related titles. To keep this paper short I will not give proofs and will restrict myself to problems in graph theory, but I will try to give references and make these as complete as possible. I will start with Turk type problems in extremal graph theory. 1991 Mathematics Subject Classification. 05C35; 05C15.
ASJC Scopus subject areas
- Mathematics (miscellaneous)