Iterated Priority Arguments in Descriptive Set Theory

Abstract

We present the true stages machinery and illustrate its applications to descriptive set theory. We use this machinery to provide new proofs of the Hausdorff-Kuratowski and Wadge theorems on the structure of ${\mathbf{\Delta }}_{\xi }^0$, Louveau and Saint-Raymond's separation theorem, and Louveau's separation theorem.

References in corpus (2)

• Iterated Priority Arguments in Descriptive Set Theory
• An Effective Classification of Borel Wadge Classes

Cited by in corpus (1)

• Iterated Priority Arguments in Descriptive Set Theory