exrot3

Theorem.

Arguments:

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

Assertions:

(existsxexistsyexistszphileftrightarrowexistsyexistszexistsxphi)

Proof:

Hyp Ref Line Expr
excom131(existsxexistsyexistszphileftrightarrowexistszexistsyexistsxphi)
excom2(existszexistsyexistsxphileftrightarrowexistsyexistszexistsxphi)
1, 2bitr3(existsxexistsyexistszphileftrightarrowexistsyexistszexistsxphi)