Calc
FreshVar()
FreshVars()
Inductive()
Lemma()
NewType()
PTheorem()
Proof
QExists()
QForAll()
QImplies()
Struct()
Theorem()
axiom()
cond()
define()
prove()
search()
simp()
Env
binder()
binders()
expr()
inductive()
lean()
parse()
pattern()
quant()
sort()
start()
theorem()
tree (Tree)
env (Env)
SortRef