Representation of Markoff's binary quadratic forms by geodesics on a perforated torus

DOI10.4064/aa-18-1-125-136zbMath0218.10041OpenAlexW745406680MaRDI QIDQ5622285

Harvey Cohn

Publication date: 1971

Published in: Acta Arithmetica (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/204972

Mathematics Subject Classification ID

Geodesics in global differential geometry (53C22) Word problems, other decision problems, connections with logic and automata (group-theoretic aspects) (20F10) Homology and cohomology theories in algebraic topology (55N99) General binary quadratic forms (11E16) Homotopy groups (55Q99)

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