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The First Turkish International Conference on Topology and its Applications
August 2-5, 2000
Istanbul University
Istanbul, Turkey

Organizers
Nurettin Ergun, Mahir Hasanov, Turgut Önder, Cem Tezer, Murat Tuncali, Stephen Watson

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Borel Sets and Weak Separation Axioms
by
Joseph T H Lo
St Edmund Hall, University of Oxford

The interaction of the Borel classes with separation axioms between T0 and T1 are considered. A topological space is said to be GTD (resp. GT\frac12) if each point is an intersection of a closed set with a G\delta set (resp. each point is closed or a G\delta-point). Minimal GTD- and minimal GT\frac12-spaces are characterised. Relevant examples are presented.

Date received: June 23, 2000

Copyright © 2000 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # caeh-38.