Theorem adantrrl

Deduction adding a conjunct to antecedent. (Contributed by NM, 26-Dec-2004.) (Proof shortened by Wolf Lammen, 4-Dec-2012.)

Hypothesis
adantr2.1
\( \vdash \varphi \wedge (\psi \wedge \chi) \rightarrow \theta \)
Conclusion
\( \vdash \varphi \wedge (\psi \wedge (\tau \wedge \chi)) \rightarrow \theta \)
Proof
l0
simpr
\( \vdash \tau \wedge \chi \rightarrow \chi \)
adantr2.1
\( \vdash \varphi \wedge (\psi \wedge \chi) \rightarrow \theta \)
sylanr2 l0 _