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From Wikipedia, the free encyclopedia

In abstract algebra, alternativity is a property of a binary operation. A magma G is said to be left alternative if (xx)y = x(xy) for all x and y in G and right alternative if y(xx) = (yx)x for all x and y in G. A magma that is both left and right alternative is said to be alternative (flexible).[1]

Any associative magma (i.e., a semigroup) is alternative. More generally, a magma in which every pair of elements generates an associative submagma must be alternative. The converse, however, is not true, in contrast to the situation in alternative algebras. In fact, an alternative magma need not even be power-associative.

References

  1. ^ Phillips, J. D.; Stanovský, David (2010), "Automated theorem proving in quasigroup and loop theory" (PDF), AI Communications, 23 (2–3): 267–283, doi:10.3233/AIC-2010-0460, MR 2647941, Zbl 1204.68181.
This page was last edited on 18 June 2021, at 06:53
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