Proof by Contradiction/Sequent Form

Theorem
The proof by contradiction can be symbolised by the sequent:
 * $\left({p \vdash \bot}\right) \vdash \neg p$

Proof

 * align="right" | 3 ||
 * align="right" | 1
 * $\neg p$
 * Proof by Contradiction
 * 1, 2
 * 1, 2