let symmetry = EqualityTactics.symmetry_tac
let transitivity = EqualityTactics.transitivity_tac
let unfold = ReductionTactics.unfold_tac
let whd = ReductionTactics.whd_tac
let symmetry = EqualityTactics.symmetry_tac
let transitivity = EqualityTactics.transitivity_tac
let unfold = ReductionTactics.unfold_tac
let whd = ReductionTactics.whd_tac