involution 4 2 16N60 1 16W25 1 16Y30 1 3-prime near-rings 1 3-semiprime near-rings 1 Kronecker product of matrices 1 UDC 512.643.4 1 \(*\)-derivation 1 commutativity 1 condition of normality 1 decomposable abelian subgroup 1 division rings 1 equivalence of matrices 1 group 1 locally finite group 1 matrix equation 1 minimal condition 1 non-periodic group 1 order of the group 1 quadratic ring 1 semiderivation 1 solution of the equation 1 subgroup 1 valuation 1 УДК 512.643.4 1 еквівалентність матриць 1 квадратичне кільце 1 кронекерівський добуток матриць 1