Decomposing Baire functions
Jacek Cichoń, Michał Morayne, Janusz M. Pawlikowski, Sławomir Solecki · Journal of Symbolic Logic · 1991
Abstract We discuss in the paper the following problem: Given a function in a given Baire class, into “how many” (in terms of cardinal numbers) functions of lower classes can it be decomposed? The decomposition is understood here in the sense of the set-theoretical union.