let apply = PrimitiveTactics.apply_tac
let assumption = VariousTactics.assumption_tac
let auto = AutoTactic.auto_tac
-let change = PrimitiveTactics.change_tac
+let change = ReductionTactics.change_tac
let clear = ProofEngineStructuralRules.clear
let clearbody = ProofEngineStructuralRules.clearbody
let compare = DiscriminationTactics.compare_tac
let reflexivity = EqualityTactics.reflexivity_tac
let replace = EqualityTactics.replace_tac
let rewrite = EqualityTactics.rewrite_tac
-let rewrite_back = EqualityTactics.rewrite_back_tac
-let rewrite_back_simpl = EqualityTactics.rewrite_back_simpl_tac
let rewrite_simpl = EqualityTactics.rewrite_simpl_tac
let right = IntroductionTactics.right_tac
let ring = Ring.ring_tac
let split = IntroductionTactics.split_tac
let symmetry = EqualityTactics.symmetry_tac
let transitivity = EqualityTactics.transitivity_tac
+let unfold = ReductionTactics.unfold_tac
let whd = ReductionTactics.whd_tac