On finding the generalized inverse matrix for the product of matrices pp. 191-197

X. M. Ren, Y. Wang, and K. P. Shum


An algorithmic approach to maximal unions of chains in a partially ordered set pp. 199-216

M. Barnabei, F. Bonetti, and M. Silimbani


Perfect wrpp semigroups pp. 217-227

Y. Z. Chen and Y. Li


Catalan-like numbers and succession rules pp. 229-250

L. Ferrari and R. Pinzani


On a tomographic equivalence between (0,1)-matrices pp. 251-265

A. Frosini and M. Nivat


The structure and labelled enumeration of K3,3-subdivision-free projective-planar graphs pp. 267-286

A. Gagarin, G. Labelle, and P. Leroux


Two new characterizations for sporadic simple groups pp. 287-293

A. Khosravi and B. Khosravi


A variant of the guessing secrets game pp. 295-305

G. Louchard, C. Marini, F. Montagna, and G. Simi


Regular elements of some transformation semigroups pp. 307-314

S. Nenthein, P. Youngkhong, and Y. Kemprasit