Abstract of Colloquium talk at Math Department of WVU, January 23, 1997

Professor Andrzej Roslanowski

Hebrew University of Jerusalem, Israel



Meager and null ideals are not alone



We present motivation and background of attempts to characterize the two classical ideals on the real line: We will present recent results showing that these two objects are not unique (which answers a question of Kunen).

The talk will be aimed at a general mathematical audience.