Sokhatsky, F.M.; Krainichuk, H.V.; Sydoruk, V.A.
(Algebra and Discrete Mathematics, 2021)
A σ-parastrophe of a class of quasigroups 𝕬 is a class σ𝕬 of all σ-parastrophes of quasigroups from 𝕬. A set of all pairwise parastrophic classes is called a parastrophic orbit or a truss. A parastrophically closed ...