On the length of Borel hierarchies

DOI10.1016/0003-4843(79)90003-2zbMath0415.03038OpenAlexW2053810839MaRDI QIDQ3050418

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Publication date: 1979

Published in: (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0003-4843(79)90003-2

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