# Volume 40 (1999)

## Editorial

## Contributions

*M. Klin, C. Rücker, G. Rücker, G. Tinhofer*: Algebraic Combinatorics
in Mathematical Chemistry. Methods and Algorithms, pp. 7-138
*F. Chyzak, I. Gutman, P. Paule*: Predicting the Number of Hexagonal
Systems with 24 and 25 Hexagons, pp. 139-151
*V. V. Iliev*: On Lunn-Senior's Mathematical Model of Isomerism in
Organic Chemistry. Part I, pp. 153-186
*S. Nikolic, I. M. Tolic, N. Trinajstic*: On the Complexity of
Molecular Graphs, pp. 187-201
*V. R. Rosenfeld*: Endomorphisms of a Weighted Molecular Graph and
Its Spectrum, pp.203-214
*P. F. Stadler, G. Tinhofer*: Equitable Partitions, Coherent Algebras
and Random Walks: Applications to the Correlation Structure of Landscapes,
pp. 215-261

## Computer Corner

*O. Bastert*: Computing Equitable Partitions of Graphs, pp.
265-272
*G. G. Cash, W. C. Herndon*: Novel Approaches to Exact Coefficients
of Acyclic Polynomials, pp. 273-278