Disjoint Borel functions

作者：Hathaway Dan^*

来源：Annals of Pure and Applied Logic, 2017, 168(8): 1552-1563.

DOI：10.1016/j.apal.2017.02.004

• Cardinal characteristics
• Descriptive set theory
• Forcing

For each alpha is an element of (omega)omega, we define a Baire class one function f(alpha) : (omega)omega -> (omega)omega which encodes alpha in a certain sense. We show that for each Borel g : (omega)omega -> (omega)omega, f(alpha) boolean AND g = empty set

• 出版日期2017-8