E-Book Overview
An advanced graduate course. Some knowledge of forcing is assumed, and some elementary Mathematical Logic, e.g. the Lowenheim-Skolem Theorem. A student with one semester of mathematical logic and 1 of set theory should be prepared to read these notes. The first half deals with the general area of Borel hierarchies. What are the possible lengths of a Borel hierarchy in a separable metric space? Lebesgue showed that in an uncountable complete separable metric space the Borel hierarchy has uncountably many distinct levels, but for incomplete spaces the answer is independent. The second half includes Harrington's Theorem - it is consistent to have sets on the second level of the projective hierarchy of arbitrary size less than the continuum and a proof and appl- ications of Louveau's Theorem on hyperprojective parameters.
E-Book Content
Lecture Notes in Logic Arnold W. Miller
Descriptive Set Theory and Forcing
Springer
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Lecture Notes in Logic Editors: S. Buss, San Diego J.-Y. Girard, Marseille A. Lachlan, Burnaby T. Slaman, Chicago