Exercise logic.propositional.dnf.unicode
Description
Proposition to DNF (unicode support)
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
(¬(q → p) ↔ ((r ↔ s) ∨ ¬s)) ∧ (¬(q → p) ↔ ((r ↔ s) ∨ ¬s))
⇒ logic.propositional.defequiv(¬(q → p) ↔ ((r ↔ s) ∨ ¬s)) ∧ (¬(q → p) ↔ ((r ∧ s) ∨ (¬r ∧ ¬s) ∨ ¬s))