On the notion of gradient. I. Essentiality of regularity suppositions
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Publication:3267837
DOI10.4064/AP-8-1-1-4zbMath0092.14202OpenAlexW778496305MaRDI QIDQ3267837
Publication date: 1960
Published in: Annales Polonici Mathematici (Search for Journal in Brave)
Full work available at URL: https://eudml.org/doc/208437
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