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Theorem cpcoll2d 44686
Description: cpcolld 44685 with an extra existential quantifier. (Contributed by Rohan Ridenour, 12-Aug-2023.)
Hypotheses
Ref Expression
cpcoll2d.1 (𝜑𝑥𝐴)
cpcoll2d.2 (𝜑 → ∃𝑦 𝑥𝐹𝑦)
Assertion
Ref Expression
cpcoll2d (𝜑 → ∃𝑦 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑦)
Distinct variable groups:   𝑥,𝑦,𝐹   𝑥,𝐴,𝑦
Allowed substitution hints:   𝜑(𝑥,𝑦)

Proof of Theorem cpcoll2d
Dummy variable 𝑎 is distinct from all other variables.
StepHypRef Expression
1 cpcoll2d.2 . . 3 (𝜑 → ∃𝑦 𝑥𝐹𝑦)
2 breq2 5089 . . . 4 (𝑎 = 𝑦 → (𝑥𝐹𝑎𝑥𝐹𝑦))
32cbvexvw 2039 . . 3 (∃𝑎 𝑥𝐹𝑎 ↔ ∃𝑦 𝑥𝐹𝑦)
41, 3sylibr 234 . 2 (𝜑 → ∃𝑎 𝑥𝐹𝑎)
5 cpcoll2d.1 . . . . 5 (𝜑𝑥𝐴)
65adantr 480 . . . 4 ((𝜑𝑥𝐹𝑎) → 𝑥𝐴)
7 simpr 484 . . . 4 ((𝜑𝑥𝐹𝑎) → 𝑥𝐹𝑎)
86, 7cpcolld 44685 . . 3 ((𝜑𝑥𝐹𝑎) → ∃𝑎 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑎)
92cbvrexvw 3216 . . 3 (∃𝑎 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑎 ↔ ∃𝑦 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑦)
108, 9sylib 218 . 2 ((𝜑𝑥𝐹𝑎) → ∃𝑦 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑦)
114, 10exlimddv 1937 1 (𝜑 → ∃𝑦 ∈ (𝐹 Coll 𝐴)𝑥𝐹𝑦)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wex 1781  wcel 2114  wrex 3061   class class class wbr 5085   Coll ccoll 44677
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-nul 5241  ax-pow 5307  ax-pr 5375  ax-un 7689
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3062  df-reu 3343  df-rab 3390  df-v 3431  df-sbc 3729  df-csb 3838  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-pss 3909  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-int 4890  df-iun 4935  df-iin 4936  df-br 5086  df-opab 5148  df-mpt 5167  df-tr 5193  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6265  df-ord 6326  df-on 6327  df-lim 6328  df-suc 6329  df-iota 6454  df-fun 6500  df-fn 6501  df-f 6502  df-f1 6503  df-fo 6504  df-f1o 6505  df-fv 6506  df-ov 7370  df-om 7818  df-2nd 7943  df-frecs 8231  df-wrecs 8262  df-recs 8311  df-rdg 8349  df-r1 9688  df-rank 9689  df-scott 44663  df-coll 44678
This theorem is referenced by:  grumnudlem  44712
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