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Theorem bj-exlimmpi 34718
Description: Lemma for bj-vtoclg1f1 34723 (an instance of this lemma is a version of bj-vtoclg1f1 34723 where 𝑥 and 𝑦 are identified). (Contributed by BJ, 30-Apr-2019.) (Proof modification is discouraged.)
Hypotheses
Ref Expression
bj-exlimmpi.nf 𝑥𝜓
bj-exlimmpi.maj (𝜒 → (𝜑𝜓))
bj-exlimmpi.min 𝜑
Assertion
Ref Expression
bj-exlimmpi (∃𝑥𝜒𝜓)

Proof of Theorem bj-exlimmpi
StepHypRef Expression
1 bj-exlimmpi.nf . 2 𝑥𝜓
2 bj-exlimmpi.min . . 3 𝜑
3 bj-exlimmpi.maj . . 3 (𝜒 → (𝜑𝜓))
42, 3mpi 20 . 2 (𝜒𝜓)
51, 4exlimi 2218 1 (∃𝑥𝜒𝜓)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wex 1786  wnf 1790
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1916  ax-6 1974  ax-7 2019  ax-12 2178
This theorem depends on definitions:  df-bi 210  df-ex 1787  df-nf 1791
This theorem is referenced by:  bj-vtoclg1f1  34723  bj-vtoclg1f  34724  bj-vtoclg1fv  34725
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