Point-set games and functions with the hereditary small oscillation property

Abstract

Given a metric space $X$, we consider certain families of functions $f:X\to \mathbb{R}$ having the hereditary oscillation property HSOP and the hereditary continuous restriction property HCRP on large sets. When $X$ is Polish, among them there are families of Baire measurable functions, $\overline{\hat{I}}¼$-measurable functions (for a finite nonatomic Borel measure $\hat{I}¼$ on $X$) and Marczewski measurable functions. We obtain their characterizations using a class of equivalent point-set games. In similar aspects, we study cliquish functions, SZ-functions and countably continuous functions.