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Theorem ltexprlemm 6755
Description: Our constructed difference is inhabited. Lemma for ltexpri 6768. (Contributed by Jim Kingdon, 17-Dec-2019.)
Hypothesis
Ref Expression
ltexprlem.1 𝐶 = ⟨{𝑥Q ∣ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑥) ∈ (1st𝐵))}, {𝑥Q ∣ ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑥) ∈ (2nd𝐵))}⟩
Assertion
Ref Expression
ltexprlemm (𝐴<P 𝐵 → (∃𝑞Q 𝑞 ∈ (1st𝐶) ∧ ∃𝑟Q 𝑟 ∈ (2nd𝐶)))
Distinct variable groups:   𝑥,𝑦,𝑞,𝑟,𝐴   𝑥,𝐵,𝑦,𝑞,𝑟   𝑥,𝐶,𝑦,𝑞,𝑟

Proof of Theorem ltexprlemm
Dummy variable 𝑤 is distinct from all other variables.
StepHypRef Expression
1 ltrelpr 6660 . . . . . . . . 9 <P ⊆ (P × P)
21brel 4419 . . . . . . . 8 (𝐴<P 𝐵 → (𝐴P𝐵P))
3 ltdfpr 6661 . . . . . . . . 9 ((𝐴P𝐵P) → (𝐴<P 𝐵 ↔ ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵))))
43biimpd 136 . . . . . . . 8 ((𝐴P𝐵P) → (𝐴<P 𝐵 → ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵))))
52, 4mpcom 36 . . . . . . 7 (𝐴<P 𝐵 → ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)))
6 simprrl 499 . . . . . . . . . 10 ((𝐴<P 𝐵 ∧ (𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)))) → 𝑦 ∈ (2nd𝐴))
72simprd 111 . . . . . . . . . . . . 13 (𝐴<P 𝐵𝐵P)
8 prop 6630 . . . . . . . . . . . . . . . . . 18 (𝐵P → ⟨(1st𝐵), (2nd𝐵)⟩ ∈ P)
9 prnmaxl 6643 . . . . . . . . . . . . . . . . . 18 ((⟨(1st𝐵), (2nd𝐵)⟩ ∈ P𝑦 ∈ (1st𝐵)) → ∃𝑤 ∈ (1st𝐵)𝑦 <Q 𝑤)
108, 9sylan 271 . . . . . . . . . . . . . . . . 17 ((𝐵P𝑦 ∈ (1st𝐵)) → ∃𝑤 ∈ (1st𝐵)𝑦 <Q 𝑤)
11 ltexnqi 6564 . . . . . . . . . . . . . . . . . 18 (𝑦 <Q 𝑤 → ∃𝑞Q (𝑦 +Q 𝑞) = 𝑤)
1211reximi 2433 . . . . . . . . . . . . . . . . 17 (∃𝑤 ∈ (1st𝐵)𝑦 <Q 𝑤 → ∃𝑤 ∈ (1st𝐵)∃𝑞Q (𝑦 +Q 𝑞) = 𝑤)
1310, 12syl 14 . . . . . . . . . . . . . . . 16 ((𝐵P𝑦 ∈ (1st𝐵)) → ∃𝑤 ∈ (1st𝐵)∃𝑞Q (𝑦 +Q 𝑞) = 𝑤)
14 df-rex 2329 . . . . . . . . . . . . . . . 16 (∃𝑤 ∈ (1st𝐵)∃𝑞Q (𝑦 +Q 𝑞) = 𝑤 ↔ ∃𝑤(𝑤 ∈ (1st𝐵) ∧ ∃𝑞Q (𝑦 +Q 𝑞) = 𝑤))
1513, 14sylib 131 . . . . . . . . . . . . . . 15 ((𝐵P𝑦 ∈ (1st𝐵)) → ∃𝑤(𝑤 ∈ (1st𝐵) ∧ ∃𝑞Q (𝑦 +Q 𝑞) = 𝑤))
16 r19.42v 2484 . . . . . . . . . . . . . . . 16 (∃𝑞Q (𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤) ↔ (𝑤 ∈ (1st𝐵) ∧ ∃𝑞Q (𝑦 +Q 𝑞) = 𝑤))
1716exbii 1512 . . . . . . . . . . . . . . 15 (∃𝑤𝑞Q (𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤) ↔ ∃𝑤(𝑤 ∈ (1st𝐵) ∧ ∃𝑞Q (𝑦 +Q 𝑞) = 𝑤))
1815, 17sylibr 141 . . . . . . . . . . . . . 14 ((𝐵P𝑦 ∈ (1st𝐵)) → ∃𝑤𝑞Q (𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤))
19 eleq1 2116 . . . . . . . . . . . . . . . . 17 ((𝑦 +Q 𝑞) = 𝑤 → ((𝑦 +Q 𝑞) ∈ (1st𝐵) ↔ 𝑤 ∈ (1st𝐵)))
2019biimparc 287 . . . . . . . . . . . . . . . 16 ((𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤) → (𝑦 +Q 𝑞) ∈ (1st𝐵))
2120reximi 2433 . . . . . . . . . . . . . . 15 (∃𝑞Q (𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
2221exlimiv 1505 . . . . . . . . . . . . . 14 (∃𝑤𝑞Q (𝑤 ∈ (1st𝐵) ∧ (𝑦 +Q 𝑞) = 𝑤) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
2318, 22syl 14 . . . . . . . . . . . . 13 ((𝐵P𝑦 ∈ (1st𝐵)) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
247, 23sylan 271 . . . . . . . . . . . 12 ((𝐴<P 𝐵𝑦 ∈ (1st𝐵)) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
2524adantrl 455 . . . . . . . . . . 11 ((𝐴<P 𝐵 ∧ (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵))) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
2625adantrl 455 . . . . . . . . . 10 ((𝐴<P 𝐵 ∧ (𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)))) → ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))
276, 26jca 294 . . . . . . . . 9 ((𝐴<P 𝐵 ∧ (𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)))) → (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵)))
2827expr 361 . . . . . . . 8 ((𝐴<P 𝐵𝑦Q) → ((𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)) → (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))))
2928reximdva 2438 . . . . . . 7 (𝐴<P 𝐵 → (∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ 𝑦 ∈ (1st𝐵)) → ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵))))
305, 29mpd 13 . . . . . 6 (𝐴<P 𝐵 → ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵)))
31 r19.42v 2484 . . . . . . 7 (∃𝑞Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵)))
3231rexbii 2348 . . . . . 6 (∃𝑦Q𝑞Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ ∃𝑞Q (𝑦 +Q 𝑞) ∈ (1st𝐵)))
3330, 32sylibr 141 . . . . 5 (𝐴<P 𝐵 → ∃𝑦Q𝑞Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))
34 rexcom 2491 . . . . 5 (∃𝑦Q𝑞Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q𝑦Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))
3533, 34sylib 131 . . . 4 (𝐴<P 𝐵 → ∃𝑞Q𝑦Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))
362simpld 109 . . . . . . . . . . . 12 (𝐴<P 𝐵𝐴P)
37 prop 6630 . . . . . . . . . . . . 13 (𝐴P → ⟨(1st𝐴), (2nd𝐴)⟩ ∈ P)
38 elprnqu 6637 . . . . . . . . . . . . 13 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑦 ∈ (2nd𝐴)) → 𝑦Q)
3937, 38sylan 271 . . . . . . . . . . . 12 ((𝐴P𝑦 ∈ (2nd𝐴)) → 𝑦Q)
4036, 39sylan 271 . . . . . . . . . . 11 ((𝐴<P 𝐵𝑦 ∈ (2nd𝐴)) → 𝑦Q)
4140ex 112 . . . . . . . . . 10 (𝐴<P 𝐵 → (𝑦 ∈ (2nd𝐴) → 𝑦Q))
4241pm4.71rd 380 . . . . . . . . 9 (𝐴<P 𝐵 → (𝑦 ∈ (2nd𝐴) ↔ (𝑦Q𝑦 ∈ (2nd𝐴))))
4342anbi1d 446 . . . . . . . 8 (𝐴<P 𝐵 → ((𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ((𝑦Q𝑦 ∈ (2nd𝐴)) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
44 anass 387 . . . . . . . 8 (((𝑦Q𝑦 ∈ (2nd𝐴)) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ (𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
4543, 44syl6bb 189 . . . . . . 7 (𝐴<P 𝐵 → ((𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ (𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))))
4645exbidv 1722 . . . . . 6 (𝐴<P 𝐵 → (∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑦(𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))))
4746rexbidv 2344 . . . . 5 (𝐴<P 𝐵 → (∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q𝑦(𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))))
48 df-rex 2329 . . . . . 6 (∃𝑦Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑦(𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
4948rexbii 2348 . . . . 5 (∃𝑞Q𝑦Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q𝑦(𝑦Q ∧ (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
5047, 49syl6bbr 191 . . . 4 (𝐴<P 𝐵 → (∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q𝑦Q (𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
5135, 50mpbird 160 . . 3 (𝐴<P 𝐵 → ∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))
52 ltexprlem.1 . . . . . 6 𝐶 = ⟨{𝑥Q ∣ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑥) ∈ (1st𝐵))}, {𝑥Q ∣ ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑥) ∈ (2nd𝐵))}⟩
5352ltexprlemell 6753 . . . . 5 (𝑞 ∈ (1st𝐶) ↔ (𝑞Q ∧ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
5453rexbii 2348 . . . 4 (∃𝑞Q 𝑞 ∈ (1st𝐶) ↔ ∃𝑞Q (𝑞Q ∧ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
55 ssid 2991 . . . . 5 QQ
56 rexss 3034 . . . . 5 (QQ → (∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q (𝑞Q ∧ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))))
5755, 56ax-mp 7 . . . 4 (∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)) ↔ ∃𝑞Q (𝑞Q ∧ ∃𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵))))
5854, 57bitr4i 180 . . 3 (∃𝑞Q 𝑞 ∈ (1st𝐶) ↔ ∃𝑞Q𝑦(𝑦 ∈ (2nd𝐴) ∧ (𝑦 +Q 𝑞) ∈ (1st𝐵)))
5951, 58sylibr 141 . 2 (𝐴<P 𝐵 → ∃𝑞Q 𝑞 ∈ (1st𝐶))
60 nfv 1437 . . 3 𝑟 𝐴<P 𝐵
61 nfre1 2382 . . 3 𝑟𝑟Q 𝑟 ∈ (2nd𝐶)
62 prmu 6633 . . . . 5 (⟨(1st𝐵), (2nd𝐵)⟩ ∈ P → ∃𝑟Q 𝑟 ∈ (2nd𝐵))
63 rexex 2385 . . . . 5 (∃𝑟Q 𝑟 ∈ (2nd𝐵) → ∃𝑟 𝑟 ∈ (2nd𝐵))
6462, 63syl 14 . . . 4 (⟨(1st𝐵), (2nd𝐵)⟩ ∈ P → ∃𝑟 𝑟 ∈ (2nd𝐵))
657, 8, 643syl 17 . . 3 (𝐴<P 𝐵 → ∃𝑟 𝑟 ∈ (2nd𝐵))
66 elprnqu 6637 . . . . . . 7 ((⟨(1st𝐵), (2nd𝐵)⟩ ∈ P𝑟 ∈ (2nd𝐵)) → 𝑟Q)
678, 66sylan 271 . . . . . 6 ((𝐵P𝑟 ∈ (2nd𝐵)) → 𝑟Q)
687, 67sylan 271 . . . . 5 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → 𝑟Q)
69 prml 6632 . . . . . . . . 9 (⟨(1st𝐴), (2nd𝐴)⟩ ∈ P → ∃𝑦Q 𝑦 ∈ (1st𝐴))
7037, 69syl 14 . . . . . . . 8 (𝐴P → ∃𝑦Q 𝑦 ∈ (1st𝐴))
71 rexex 2385 . . . . . . . 8 (∃𝑦Q 𝑦 ∈ (1st𝐴) → ∃𝑦 𝑦 ∈ (1st𝐴))
7236, 70, 713syl 17 . . . . . . 7 (𝐴<P 𝐵 → ∃𝑦 𝑦 ∈ (1st𝐴))
7372adantr 265 . . . . . 6 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → ∃𝑦 𝑦 ∈ (1st𝐴))
74683adant3 935 . . . . . . . . 9 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → 𝑟Q)
75 simp3 917 . . . . . . . . . 10 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → 𝑦 ∈ (1st𝐴))
76 elprnql 6636 . . . . . . . . . . . . . . 15 ((⟨(1st𝐴), (2nd𝐴)⟩ ∈ P𝑦 ∈ (1st𝐴)) → 𝑦Q)
7737, 76sylan 271 . . . . . . . . . . . . . 14 ((𝐴P𝑦 ∈ (1st𝐴)) → 𝑦Q)
7836, 77sylan 271 . . . . . . . . . . . . 13 ((𝐴<P 𝐵𝑦 ∈ (1st𝐴)) → 𝑦Q)
79783adant2 934 . . . . . . . . . . . 12 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → 𝑦Q)
80 addcomnqg 6536 . . . . . . . . . . . 12 ((𝑟Q𝑦Q) → (𝑟 +Q 𝑦) = (𝑦 +Q 𝑟))
8174, 79, 80syl2anc 397 . . . . . . . . . . 11 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → (𝑟 +Q 𝑦) = (𝑦 +Q 𝑟))
82 ltaddnq 6562 . . . . . . . . . . . . 13 ((𝑟Q𝑦Q) → 𝑟 <Q (𝑟 +Q 𝑦))
8374, 79, 82syl2anc 397 . . . . . . . . . . . 12 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → 𝑟 <Q (𝑟 +Q 𝑦))
84 prcunqu 6640 . . . . . . . . . . . . . . 15 ((⟨(1st𝐵), (2nd𝐵)⟩ ∈ P𝑟 ∈ (2nd𝐵)) → (𝑟 <Q (𝑟 +Q 𝑦) → (𝑟 +Q 𝑦) ∈ (2nd𝐵)))
858, 84sylan 271 . . . . . . . . . . . . . 14 ((𝐵P𝑟 ∈ (2nd𝐵)) → (𝑟 <Q (𝑟 +Q 𝑦) → (𝑟 +Q 𝑦) ∈ (2nd𝐵)))
867, 85sylan 271 . . . . . . . . . . . . 13 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → (𝑟 <Q (𝑟 +Q 𝑦) → (𝑟 +Q 𝑦) ∈ (2nd𝐵)))
87863adant3 935 . . . . . . . . . . . 12 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → (𝑟 <Q (𝑟 +Q 𝑦) → (𝑟 +Q 𝑦) ∈ (2nd𝐵)))
8883, 87mpd 13 . . . . . . . . . . 11 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → (𝑟 +Q 𝑦) ∈ (2nd𝐵))
8981, 88eqeltrrd 2131 . . . . . . . . . 10 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → (𝑦 +Q 𝑟) ∈ (2nd𝐵))
90 19.8a 1498 . . . . . . . . . 10 ((𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑟) ∈ (2nd𝐵)) → ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑟) ∈ (2nd𝐵)))
9175, 89, 90syl2anc 397 . . . . . . . . 9 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑟) ∈ (2nd𝐵)))
9274, 91jca 294 . . . . . . . 8 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → (𝑟Q ∧ ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑟) ∈ (2nd𝐵))))
9352ltexprlemelu 6754 . . . . . . . 8 (𝑟 ∈ (2nd𝐶) ↔ (𝑟Q ∧ ∃𝑦(𝑦 ∈ (1st𝐴) ∧ (𝑦 +Q 𝑟) ∈ (2nd𝐵))))
9492, 93sylibr 141 . . . . . . 7 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵) ∧ 𝑦 ∈ (1st𝐴)) → 𝑟 ∈ (2nd𝐶))
95943expa 1115 . . . . . 6 (((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) ∧ 𝑦 ∈ (1st𝐴)) → 𝑟 ∈ (2nd𝐶))
9673, 95exlimddv 1794 . . . . 5 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → 𝑟 ∈ (2nd𝐶))
97 19.8a 1498 . . . . 5 ((𝑟Q𝑟 ∈ (2nd𝐶)) → ∃𝑟(𝑟Q𝑟 ∈ (2nd𝐶)))
9868, 96, 97syl2anc 397 . . . 4 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → ∃𝑟(𝑟Q𝑟 ∈ (2nd𝐶)))
99 df-rex 2329 . . . 4 (∃𝑟Q 𝑟 ∈ (2nd𝐶) ↔ ∃𝑟(𝑟Q𝑟 ∈ (2nd𝐶)))
10098, 99sylibr 141 . . 3 ((𝐴<P 𝐵𝑟 ∈ (2nd𝐵)) → ∃𝑟Q 𝑟 ∈ (2nd𝐶))
10160, 61, 65, 100exlimdd 1768 . 2 (𝐴<P 𝐵 → ∃𝑟Q 𝑟 ∈ (2nd𝐶))
10259, 101jca 294 1 (𝐴<P 𝐵 → (∃𝑞Q 𝑞 ∈ (1st𝐶) ∧ ∃𝑟Q 𝑟 ∈ (2nd𝐶)))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 101  wb 102  w3a 896   = wceq 1259  wex 1397  wcel 1409  wrex 2324  {crab 2327  wss 2944  cop 3405   class class class wbr 3791  cfv 4929  (class class class)co 5539  1st c1st 5792  2nd c2nd 5793  Qcnq 6435   +Q cplq 6437   <Q cltq 6440  Pcnp 6446  <P cltp 6450
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-in1 554  ax-in2 555  ax-io 640  ax-5 1352  ax-7 1353  ax-gen 1354  ax-ie1 1398  ax-ie2 1399  ax-8 1411  ax-10 1412  ax-11 1413  ax-i12 1414  ax-bndl 1415  ax-4 1416  ax-13 1420  ax-14 1421  ax-17 1435  ax-i9 1439  ax-ial 1443  ax-i5r 1444  ax-ext 2038  ax-coll 3899  ax-sep 3902  ax-nul 3910  ax-pow 3954  ax-pr 3971  ax-un 4197  ax-setind 4289  ax-iinf 4338
This theorem depends on definitions:  df-bi 114  df-dc 754  df-3or 897  df-3an 898  df-tru 1262  df-fal 1265  df-nf 1366  df-sb 1662  df-eu 1919  df-mo 1920  df-clab 2043  df-cleq 2049  df-clel 2052  df-nfc 2183  df-ne 2221  df-ral 2328  df-rex 2329  df-reu 2330  df-rab 2332  df-v 2576  df-sbc 2787  df-csb 2880  df-dif 2947  df-un 2949  df-in 2951  df-ss 2958  df-nul 3252  df-pw 3388  df-sn 3408  df-pr 3409  df-op 3411  df-uni 3608  df-int 3643  df-iun 3686  df-br 3792  df-opab 3846  df-mpt 3847  df-tr 3882  df-eprel 4053  df-id 4057  df-iord 4130  df-on 4132  df-suc 4135  df-iom 4341  df-xp 4378  df-rel 4379  df-cnv 4380  df-co 4381  df-dm 4382  df-rn 4383  df-res 4384  df-ima 4385  df-iota 4894  df-fun 4931  df-fn 4932  df-f 4933  df-f1 4934  df-fo 4935  df-f1o 4936  df-fv 4937  df-ov 5542  df-oprab 5543  df-mpt2 5544  df-1st 5794  df-2nd 5795  df-recs 5950  df-irdg 5987  df-1o 6031  df-oadd 6035  df-omul 6036  df-er 6136  df-ec 6138  df-qs 6142  df-ni 6459  df-pli 6460  df-mi 6461  df-lti 6462  df-plpq 6499  df-mpq 6500  df-enq 6502  df-nqqs 6503  df-plqqs 6504  df-mqqs 6505  df-1nqqs 6506  df-ltnqqs 6508  df-inp 6621  df-iltp 6625
This theorem is referenced by:  ltexprlempr  6763
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