Theorem simplr

Description: Simplification of a conjunction. (Contributed by NM, 20-Mar-2007)

	Ref	Expression
Assertion	simplr	$$⊢\left(\left(\phi \wedge \psi \right)\wedge \chi \right)\to \psi$$

Proof

Step	Hyp	Ref	Expression
1		id	$$⊢\psi \to \psi$$
2	1	ad2antlr	$$⊢\left(\left(\phi \wedge \psi \right)\wedge \chi \right)\to \psi$$