A characteristic property of surfaces of negative curvature.
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Publication:2618125
DOI10.1090/S0002-9904-1934-05963-9zbMath60.0613.01OpenAlexW2119508360MaRDI QIDQ2618125
Publication date: 1934
Published in: Bulletin of the American Mathematical Society (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1090/s0002-9904-1934-05963-9
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