_____________________________________________________________________ PSSL 68 - Program Saturday, August 29 9.00 - 9.30 P. T. Johnstone, How bad can a category of sheaves be? 9.40 - 10.10 J. Adamek, Continuous lattices and continuous categories revisited 10.40 - 11.10 M.-C. Pedicchio, A characterization theorem for theories of varieties 11.20 - 11.50 H.-E. Porst, to be announced 12.00 - 12.30 J. Juerjens, On a problem by Gabriel and Ulmer 14.00 - 14.30 A. K. Simpson, Elementary axioms for categories of classes 14.40 - 15.10 P. Resende, Quantale modules and observational logic 15.20 - 15.50 R. Rother, Strengthening of homogeneity in categorical algebra 16.20 - 16.50 L. Polak, On equational logic (for semigroups) 17.00 - 17.30 M. Sekanina, Shape in computing 17.40 - 18.10 O. Kamenik, to be announced Sunday, August 30 9.00 - 9.30 R. Wood, Adjunctions for equipments 9.40 - 10.10 E. Vitale, On the exact completion of the homotopy category 10.40 - 11.10 M. Jibladze, Scattered toposes 11.20 - 11.50 J. Velebil, 1-step cocompletions 12.00 - 12.30 J. Rosicky, How algebraic is algebra?