In mathematics, the Griess algebra is a commutative non-associative algebra on a real vector space of dimension 196884 that has the Monster group M as its automorphism group. It is named after mathematician R. L. Griess, who constructed it in 1980 and subsequently used it in 1982 to construct M. The Monster fixes (vectorwise) a 1-space in this algebra and acts absolutely irreducibly on the 196883-dimensional orthogonal complement of this 1-space. (The Monster preserves the standard inner product on the 196884-space.)
The Griess algebra is the same as the degree 2 piece of the monster vertex algebra, and the Griess product is one of the vertex algebra products.
- Conway, John Horton (1985), "A simple construction for the Fischer-Griess monster group", Inventiones Mathematicae 79 (3): 513–540, doi:10.1007/BF01388521, ISSN 0020-9910, MR 782233
- R. L. Griess, Jr, The Friendly Giant, Inventiones Mathematicae 69 (1982), 1-102
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