Pf()
Calc
FreshVar()
FreshVars()
Inductive()
Lemma()
NewType()
PTheorem()
Proof
QExists()
QForAll()
QImplies()
Struct()
Theorem()
axiom()
cond()
define()
prove()
search()
simp()
>>> Pf(smt.Int("x") > 0) Lambda(pf!..., x > 0)
p (BoolRef)
QuantifierRef