ax16-bv

Theorem.

Arguments:

x (sv), y (st), phi (pr),

Distinct variable conditions:

(x, y),

Assertions:

(forallx(xeqy)to(x bound in phi))

Proof:

Hyp Ref Line Expr
ax161(forallx(xeqy)to(phitoforallxphi))
df-Bvp2((x bound in phi)leftrightarrow(phitoforallxphi))
1, 2brpi22<3(forallx(xeqy)to(x bound in phi))