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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(online) ISSN 0002-9939(print)

 

Normal forms for definite integer unimodular quadratic forms


Author: Shmuel Friedland
Journal: Proc. Amer. Math. Soc. 106 (1989), 917-921
MSC: Primary 11E12
MathSciNet review: 976366
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Abstract: In this paper we show that any two positive definite integer unimodular quadratic forms have a common sublattice of codimension 2. Moreover, any such form is equivalent to a semi-normal form with at most three eigenvalues different from 1.


References [Enhancements On Off] (What's this?)

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Additional Information

DOI: http://dx.doi.org/10.1090/S0002-9939-1989-0976366-6
PII: S 0002-9939(1989)0976366-6
Article copyright: © Copyright 1989 American Mathematical Society