
theorem Th3:
  for S being unital non empty multMagma, E being non empty set,
  x being Element of E, T being LeftOperation of S, E holds x,x
  are_conjugated_under T
proof
  let S be unital non empty multMagma;
  let E be non empty set;
  let x be Element of E;
  let T be LeftOperation of S, E;
  x = (id E).x
    .= (T^1_S).x by Def1;
  hence thesis;
end;
