3 citations · 4 across the 3 of their papers we have counts for
4 papers
Measurability and Perfect Set Theorems for Equivalence Relations with Small Classes
Ohad Drucker
We ask whether or equivalence relations with -small classes for a -ideal must have perfectly many classes. We show that for a wide class…
Perfect Set Theorems for Equivalence Relations with - small classes
Ohad Drucker
A classical theorem due to Mycielski states that an equivalence relation having the Baire property and meager equivalence classes must have a perfect set of pairwise inequivale…
Hjorth Analysis of General Polish Group Actions
Ohad Drucker
Hjorth has introduced a Scott analysis for general Polish group actions, and has asked whether his notion of rank satisfies a boundedness principle similar to the one of Scott rank…
Borel Canonization of Analytic Sets with Borel Sections
Ohad Drucker
Given an analytic equivalence relation, we tend to wonder whether it is Borel. When it is non Borel, there is always the hope it will be Borel on a "large" set -- nonmeager or of p…