# Akivis algebra

A vector space over a field with an anti-symmetric bilinear multiplication and a multilinear ternary operation which are linked by the so-called Akivis condition, defined as follows [a4], [a5]. Let denote the group of all six permutations and the subgroup of all three cyclic permutations of the set . Define . The Akivis condition reads:

The specialization yields a Lie algebra. If is an arbitrary non-associative algebra over a field with a binary bilinear multiplication (cf. also Non-associative rings and algebras), then and define an Akivis algebra on . The tangent algebra of a local analytic loop (cf. Loop, analytic) is always an Akivis algebra. This generalizes the facts that the tangent algebra of a local Lie group (cf. also Lie group, local) is a Lie algebra and that the tangent algebra of a local Moufang loop is a Mal'tsev algebra. Analytic or differentiable quasi-groups (cf. Quasi-group) and loops arise in the study of the geometry of webs (cf. Web), [a2], [a3], [a5].

#### References

[a1] | M.A. Akivis, "The canonical expansions of the equations of a local analytic quasigroup" Soviet Math. Dokl. , 10 (1969) pp. 1200–1203 Dokl. Akad. Nauk SSSR , 188 (1969) pp. 967–970 |

[a2] | V.V. Goldberg, "Local differentiable quasigroups and webs" O. Chein (ed.) H.O. Pflugfelder (ed.) J.D.H. Smith (ed.) , Quasigroups and Loops - Theory and Applications , Heldermann (1990) pp. 263–311 |

[a3] | V.V. Goldberg, "Theory of multicodimensional -webs" , Kluwer Acad. Publ. (1988) |

[a4] | K.H. Hofmann, K. Strambach, "The Akivis algebra of a homogeneous loop" Mathematika , 33 (1986) pp. 87–95 |

[a5] | K.H. Hofmann, K. Strambach, "Topological and analytic loops" O. Chein (ed.) H.O. Pflugfelder (ed.) J.D.H. Smith (ed.) , Quasigroups and Loops - Theory and Applications , Heldermann (1990) pp. 205–262 |

[a6] | P.O. Miheev, L.V. Sabinin, "Quasigroups and differential geometry" O. Chein (ed.) H.O. Pflugfelder (ed.) J.D.H. Smith (ed.) , Quasigroups and Loops - Theory and Applications , Heldermann (1990) pp. 357–430 |

**How to Cite This Entry:**

Akivis algebra. K.H. Hofmann (originator),

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