theorem Th24:
  for G being non empty multMagma, H being non empty SubStr of G
  holds the multF of H = (the multF of G)||the carrier of H
proof
  let G be non empty multMagma, H be non empty SubStr of G;
  op(H) c= op(G) & dom op(H) = [:carr(H),carr(H):] by Def23,FUNCT_2:def 1;
  hence thesis by GRFUNC_1:23;
end;
