identity 3 quasigroup 3 квазігрупа 3 тотожність 3 Klein group 1 Steiner quasigroup 1 UDC 512.548.7 [004.056(06)] 1 cancellability 1 canonical decomposition 1 cyclic group 1 functional equation 1 group isotope 1 isomorphism 1 isotopism 1 loop 1 matrix 1 mediality 1 middle loop 1 parastrophe 1 parastrophic primary equivalence 1 pseudomediality 1 quadratic equation 1 reducibility 1 ternary quasigroup 1 universal loop 1 variety 1 УДК 512.548.7 [004.056(06)] 1 група Кляйна 1 груповий ізотоп 1 звідність 1