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