Theorem eximdv

Deduction form of Theorem 19.22 of [Margaris] p. 90, see exim. See eximdh and eximd for versions without a distinct variable condition. (Contributed by NM, 27-Apr-1994.)

Hypothesis
alimdv.1
\( \vdash \varphi \rightarrow \psi \rightarrow \chi \)
Conclusion
\( \vdash \varphi \rightarrow \exists x \, \psi \rightarrow \exists x \, \chi \)
Proof
l0
ax-5
alimdv.1
eximdh l0 _