Many fundamental mathematical results fail in {\bf{ZF}}, i.e., in Zermelo-Fraenkel set theory without the Axiom of Choice. This article surveys results --- old and new --- that specify how much ``choice'' is needed {\it precisely} to validate each of certain basic analytical and topological results.
@article{118951, author = {Horst Herrlich}, title = {Choice principles in elementary topology and analysis}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {38}, year = {1997}, pages = {545-552}, zbl = {0938.54007}, mrnumber = {1485074}, language = {en}, url = {http://dml.mathdoc.fr/item/118951} }
Herrlich, Horst. Choice principles in elementary topology and analysis. Commentationes Mathematicae Universitatis Carolinae, Tome 38 (1997) pp. 545-552. http://gdmltest.u-ga.fr/item/118951/
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