Theorem
3impd
Importation deduction for triple conjunction. (Contributed by NM, 26-Oct-2006.)
Hypothesis
3imp1.1
\( \vdash \varphi \rightarrow \psi \rightarrow \chi \rightarrow \theta \rightarrow \tau \)
Conclusion
\( \vdash \varphi \rightarrow \psi \wedge \chi \wedge \theta \rightarrow \tau \)
Proof
3imp1.1
com4l
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3imp
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com12
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