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COMMENT
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The 15-theorem asserts that a positive definite integral quadratic form represents all numbers if it represents the numbers in this sequence. An integral quadratic form has the form x^T Mx, where x is an integer vector and M is an integer matrix. - T. D. Noe (noe(AT)sspectra.com), Mar 30 2006
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REFERENCES
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Manjul Bhargava, On the Conway-Schneeberger fifteen theorem, Contemporary Mathematics 272 (1999), 27-37.
J. H. Conway, Universal quadratic forms and the fifteen theorem, Contemporary Mathematics 272 (1999), 23-26.
J. H. Conway, The Sensual (Quadratic) Form, M.A.A., 1997, p. 141.
J. H. Conway and W. A. Schneeberger, personal communication.
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