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A094682 Discriminants of integer positive ternary quadratic forms that are spinor regular but not regular. 0

%I

%S 64,108,108,128,256,256,324,343,432,432,432,1024,1024,1024,1372,1728,

%T 2048,3888,4096,4096,4096,5488,6912,6912,16384,16384,27648,62208,87808

%N Discriminants of integer positive ternary quadratic forms that are spinor regular but not regular.

%C List is believed to be complete.

%D G. L. Watson: Integral Quadratic Forms (Cambridge, 1960).

%H W. K. Chan and A. G. Earnest, <a href="http://dx.doi.org/10.1112/S002461070400523X">Discriminant bounds for spinor regular ternary quadratic lattices</a>, J. London Math. Soc. (2) 69 (2004), no. 3, 545-561.

%H W. C. Jagy, I. Kaplansky and A. Schiemann, <a href="http://dx.doi.org/10.1112/S002557930001264X">There are 913 regular ternary forms</a>, Mathematika 44(1997) 332-341.

%H A. Schiemann, <a href="http://dx.doi.org/10.1007/s002080050086">Ternary positive definite quadratic forms are determined by their theta series</a>, Math. Ann. 308(1997) 507-517.

%K nonn,fini,full

%O 1,1

%A _Will Jagy_, Jun 03 2004

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Last modified September 24 06:13 EDT 2021. Contains 347623 sequences. (Running on oeis4.)