Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-27T10:35:06.585Z Has data issue: false hasContentIssue false

Asymmetric minima of indefinite ternary quadratic forms

Published online by Cambridge University Press:  09 April 2009

R. T. Worley
Affiliation:
The University of AdelaideAdelaide, S.A.
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Let f = f(x) = f(x1, x2,…, xn) be an indefinite n-ary quadratic form of determinant det (f); that is, f(x) = x' Ax where A is a real symmetric matrix with determinant det (f). Such a form is said to take the value v if there exists integral x ≠ 0 such that f(x) = v.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 1967

References

[1]Barnes, E. S., ‘The non-negative values of quadratic forms’, Proc. Lond. Math. Soc. (3) 5 (1955), 185196.Google Scholar
[2]Barnes, E. S. and Oppenheim, A., ‘The non-negative values of a ternary quadratic form’, J. Land. Math. Soc. 30 (1955), 429439.Google Scholar
[3]Cassels, J. W. S. and Swinnerton-Dyer, H. P. F., ‘On the product of three homogeneous linear forms and indefinite ternary quadratic forms’, Phil. Trans. Roy. Soc. Lond. (A) 248 (1955), 7396.Google Scholar
[4]Markoff, A., ‘Sur les formes quadratiques binaires indéfinies’, (I) Math. Ann. 15 (1879), 381406. (II) Math. Ann. 17 (1880), 379–389.CrossRefGoogle Scholar
[5]Markoff, A., ‘Sur les formes quadratiques ternaires indéfinies’, Math. Ann. 56 (1903), 233251.Google Scholar
[6]Segre, M. B., ‘Lattice points in infinite domains and asymmetric diophantine approximations’, Duke Math. J 12 (1945), 337365.Google Scholar
[7]Tornheim, L., ‘Asymmetric minima of quadratic forms and asymmetric diophantine approximation’, Duke Math. J. 22 (1955), 287294.CrossRefGoogle Scholar
[8]Venkov, B. A., ‘On the extremal problem of Markoff for indefinite ternary quadratic forms’ (Russian). Izv. Acad. Nauk S.S.S.R. Ser. Mat. 9 (1945), 429494.Google Scholar
[9]Worley, R. T., ‘Minimum determinant of asymmetric quadratic forms’, J. Aust. Math. Soc. 7 (1967), 177190.Google Scholar