Admissible orders of Jordan loops
arXiv:0705.3445
Abstract
A commutative loop is Jordan if it satisfies the identity . Using an amalgam construction and its generalizations, we prove that a nonassociative Jordan loop of order exists if and only if and . We also consider whether powers of elements in Jordan loops are well-defined, and we construct an infinite family of finite simple nonassociative Jordan loops.
15 pages. V2: final version with small changes suggested by referee, to appear in J. Combinatorial Design