Decomposing functions of baire class on polish spaces

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Journal of Symbolic Logic 85 (3):960-971 (2020)
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Abstract

We prove the Decomposability Conjecture for functions of Baire class $2$ from a Polish space to a separable metrizable space. This partially answers an important open problem in descriptive set theory.

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10.1017/jsl.2020.57

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