On rational automorphs of quadratic forms
J. Wójcik (1974)
Colloquium Mathematicae
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Displaying similar documents to “A computation of the Witt index for rational quadratic forms.”
On rational automorphs of quadratic forms
Röhmel's equation for quadratic forms.
T.M.K. Davison (1987)
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On quadratic forms.
Svetozar Kurepa (1987)
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On ternary quadratic forms over the rational numbers
Amir Jafari, Farhood Rostamkhani (2022)
Czechoslovak Mathematical Journal
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For a ternary quadratic form over the rational numbers, we characterize the set of rational numbers represented by that form over the rational numbers. Consequently, we reprove the classical fact that any positive definite integral ternary quadratic form must fail to represent infinitely many positive integers over the rational numbers. Our proof uses only the quadratic reciprocity law and the Hasse-Minkowski theorem, and is elementary.
The Reduction of Positive Definite Quinary Quadratic Forms.
C.E. Nelson (1974)
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Ricardo Baeza (1979)
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Degree for cohomological invariants for quadratic forms.
Bill Jacob, Markus Rost (1989)
Inventiones mathematicae
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Euclidean quadratic forms and ADC forms II: integral forms
Pete L. Clark, William C. Jagy (2014)
Acta Arithmetica
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We study ADC quadratic forms and Euclidean quadratic forms over the integers, obtaining complete classification results in the positive case.