imp

Theorem.

Arguments:

phi (pr), psi (pr), chi (pr),

Hypotheses:

(phito(psitochi))

Assertions:

((phiwedgepsi)tochi)

Proof:

Hyp Ref Line Expr
Hypo1(phito(psitochi))
impexp2(((phiwedgepsi)tochi)leftrightarrow(phito(psitochi)))
2bi<3((phito(psitochi))to((phiwedgepsi)tochi))
1, 3ax-mp4((phiwedgepsi)tochi)