This volume contains the invited papers and papers selected for presentation at the 25th conference on Theory and Practice of Informatics | SOFSEM ’98, held in Jasn a, Slovakia, November 21{27, 1998.  Meer

This volume contains papers selected for presentation at the 15th Symposium on Mathematical Foundations of Computer Science, MFCS '90, held at Banská Bystrica, Czechoslovakia, August 27-31, 1990.  Meer