---

Step * of Lemma not_functionality_wrt_uiff

∀[P,Q:ℙ].  ({uiff(P;Q)} ⇒ {uiff(¬P;¬Q)})
BY
{ (Unfold `guard` 0 THEN Unfold `not` 0 THEN Auto) }

---

Latex:

---

Latex:
\mforall{}[P,Q:\mBbbP{}].    (\{uiff(P;Q)\}  {}\mRightarrow{}  \{uiff(\mneg{}P;\mneg{}Q)\})


By

---

Latex:
(Unfold  `guard`  0  THEN  Unfold  `not`  0  THEN  Auto)

---

Home Index