Obstructions to extensions and homotopies
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Publication:2648703
DOI10.2307/1969510zbMath0038.36601OpenAlexW2316299008MaRDI QIDQ2648703
Publication date: 1950
Published in: Annals of Mathematics. Second Series (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.2307/1969510
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