Structurable Tori

Details Structurable Tori Structurable Tori

2007-02-22

arxiv.org/abs/math/0702678v1

Comm. Algebra 36(6):2265-2332, 2008.

Mathematics

Rings and Algebras

Scientific paper

The classification of structurable tori with nontrivial involution, which was begun by Allison and Yoshii, is completed. New examples of structurable tori are obtained using a construction of structurable algebras from a semilinear version of cubic forms satisfying the adjoint identity. The classification uses techniques borrowed from quadratic forms over Z_2 and from the geometry of generalized quadrangles. Since structurable tori are the coordinate algebras for the centreless cores of extended affine Lie algebras of type BC_1, the results of this paper provide a classification and new examples for this class of Lie algebras.

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