anchor.diff:       ?assertRPNError("log10", [-1])
       ].
   
  -% Rounding
   rounding_methods() ->
       [
        ?assertRPNFloat("3.4 round",  3),
  
positive.code:      % ?assertRPNFloat("1,1 atan", {1.017221968,0.402359478})
      ].
  
  % Hyperbolic Trigonometry
  hyperbolic_trig_functions_in_real_domaion() ->
      [
       ?assertRPNFloat("2 sinh", 3.6268604079),
  
negative.code:      ?assertRPNFloat("1,1 tanh", {1.083923327,0.271752585})
      ].
  
  powers_and_logarithms_tests() ->
      [
       ?assertRPNFloat("64 sqrt", 8.0),
  