Calc
FreshVar()
FreshVars()
Inductive()
Lemma()
NewType()
PTheorem()
Proof
QExists()
QForAll()
QImplies()
Struct()
Theorem()
axiom()
cond()
define()
prove()
search()
simp()
Prove symmetry of equality
>>> x, y = smt.Ints("x y") >>> eq = kd.axiom(x == y) >>> eqsym(eq) |= y == x
eq (Proof)