Theorem
3expb
Exportation from triple to double conjunction. (Contributed by NM, 20-Aug-1995.)
Hypothesis
3exp.1
\( \vdash \varphi \wedge \psi \wedge \chi \rightarrow \theta \)
Conclusion
\( \vdash \varphi \wedge (\psi \wedge \chi) \rightarrow \theta \)
Proof
3exp.1
3exp
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imp32
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