Abstract: MATH/CHEM/COMP 2002, Dubrovnik, June 24-29, 2002



On some primary and secondary

structures in combinatorics


Darko Veljan


Department of  Mathematics, Faculty of Science and  Mathematics, University of Zagreb, Bijenička c. 30, HR-10002 Zagreb, Croatia




We will present some bijective proofs  of some well known facts in combinatorics. Some refined structures, e.g. secondary structures will also be discussed. These include Catalan, Motzkin, Narayana and secondary structure numbers from biology. Some log-convexity properties and asymptotics of these numbers will also be presented.