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Q4867187 - MaRDI portal

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scientific article; zbMATH DE number 848782
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scientific article; zbMATH DE number 848782

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    28 February 1996
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    Pythagorean diophantine equation
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    parametrization of the 2-sphere
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    quadratic diophantine equation
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    Hopf invariant
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    quadratic forms
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    algebraic varieties
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    plane elliptic curves
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    space elliptic curves
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    theta functions
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    quadratic spherical maps
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    Hurwitz problem
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    congruent numbers
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