Calc
Inductive()
Lemma
NewType()
Proof
QExists()
QForAll()
Struct()
axiom()
cond()
define()
prove()
search()
simp()
Seq()
Unit()
induct()
induct_list()
seq()
Helper to construct sequences. >>> seq(1, 2, 3) Concat(Unit(1), Concat(Unit(2), Unit(3))) >>> seq(1) Unit(1)