On the distance of some compound graphs. Deducing properties of trees from their Matula numbers. A unified approach to the first derivatives of graph polynomials. On a formula involving the first derivative of the characteristic polynomial of a graph. On the sum of all distances in graphs.
Independent vertex sets in some compound graphs.
Graphs with small numbers of independent edges. An identity for the independence polynomials of trees. A conjecture in the theory of cyclic conjugation and an example supporting its validity. A contribution to the study of real graph polynomials. Some analytical properties of the independence and matching polynomials.