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Theorem txcmplem1 22249
 Description: Lemma for txcmp 22251. (Contributed by Mario Carneiro, 14-Sep-2014.)
Hypotheses
Ref Expression
txcmp.x 𝑋 = 𝑅
txcmp.y 𝑌 = 𝑆
txcmp.r (𝜑𝑅 ∈ Comp)
txcmp.s (𝜑𝑆 ∈ Comp)
txcmp.w (𝜑𝑊 ⊆ (𝑅 ×t 𝑆))
txcmp.u (𝜑 → (𝑋 × 𝑌) = 𝑊)
txcmp.a (𝜑𝐴𝑌)
Assertion
Ref Expression
txcmplem1 (𝜑 → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣))
Distinct variable groups:   𝑢,𝐴   𝑣,𝑢,𝑆   𝑢,𝑌,𝑣   𝑢,𝑊,𝑣   𝑢,𝑋,𝑣   𝜑,𝑢   𝑢,𝑅
Allowed substitution hints:   𝜑(𝑣)   𝐴(𝑣)   𝑅(𝑣)

Proof of Theorem txcmplem1
Dummy variables 𝑓 𝑘 𝑟 𝑠 𝑡 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 txcmp.r . . 3 (𝜑𝑅 ∈ Comp)
2 id 22 . . . . . . . . 9 (𝑥𝑋𝑥𝑋)
3 txcmp.a . . . . . . . . 9 (𝜑𝐴𝑌)
4 opelxpi 5560 . . . . . . . . 9 ((𝑥𝑋𝐴𝑌) → ⟨𝑥, 𝐴⟩ ∈ (𝑋 × 𝑌))
52, 3, 4syl2anr 599 . . . . . . . 8 ((𝜑𝑥𝑋) → ⟨𝑥, 𝐴⟩ ∈ (𝑋 × 𝑌))
6 txcmp.u . . . . . . . . 9 (𝜑 → (𝑋 × 𝑌) = 𝑊)
76adantr 484 . . . . . . . 8 ((𝜑𝑥𝑋) → (𝑋 × 𝑌) = 𝑊)
85, 7eleqtrd 2895 . . . . . . 7 ((𝜑𝑥𝑋) → ⟨𝑥, 𝐴⟩ ∈ 𝑊)
9 eluni2 4807 . . . . . . 7 (⟨𝑥, 𝐴⟩ ∈ 𝑊 ↔ ∃𝑘𝑊𝑥, 𝐴⟩ ∈ 𝑘)
108, 9sylib 221 . . . . . 6 ((𝜑𝑥𝑋) → ∃𝑘𝑊𝑥, 𝐴⟩ ∈ 𝑘)
11 txcmp.w . . . . . . . . . . . 12 (𝜑𝑊 ⊆ (𝑅 ×t 𝑆))
1211adantr 484 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → 𝑊 ⊆ (𝑅 ×t 𝑆))
1312sselda 3918 . . . . . . . . . 10 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → 𝑘 ∈ (𝑅 ×t 𝑆))
14 txcmp.s . . . . . . . . . . . . 13 (𝜑𝑆 ∈ Comp)
15 eltx 22176 . . . . . . . . . . . . 13 ((𝑅 ∈ Comp ∧ 𝑆 ∈ Comp) → (𝑘 ∈ (𝑅 ×t 𝑆) ↔ ∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
161, 14, 15syl2anc 587 . . . . . . . . . . . 12 (𝜑 → (𝑘 ∈ (𝑅 ×t 𝑆) ↔ ∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
1716adantr 484 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → (𝑘 ∈ (𝑅 ×t 𝑆) ↔ ∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
1817biimpa 480 . . . . . . . . . 10 (((𝜑𝑥𝑋) ∧ 𝑘 ∈ (𝑅 ×t 𝑆)) → ∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘))
1913, 18syldan 594 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → ∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘))
20 eleq1 2880 . . . . . . . . . . . 12 (𝑦 = ⟨𝑥, 𝐴⟩ → (𝑦 ∈ (𝑟 × 𝑠) ↔ ⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠)))
2120anbi1d 632 . . . . . . . . . . 11 (𝑦 = ⟨𝑥, 𝐴⟩ → ((𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) ↔ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
22212rexbidv 3262 . . . . . . . . . 10 (𝑦 = ⟨𝑥, 𝐴⟩ → (∃𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) ↔ ∃𝑟𝑅𝑠𝑆 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
2322rspccv 3571 . . . . . . . . 9 (∀𝑦𝑘𝑟𝑅𝑠𝑆 (𝑦 ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) → (⟨𝑥, 𝐴⟩ ∈ 𝑘 → ∃𝑟𝑅𝑠𝑆 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
2419, 23syl 17 . . . . . . . 8 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → (⟨𝑥, 𝐴⟩ ∈ 𝑘 → ∃𝑟𝑅𝑠𝑆 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)))
25 opelxp1 5564 . . . . . . . . . . . . 13 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) → 𝑥𝑟)
2625ad2antrl 727 . . . . . . . . . . . 12 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → 𝑥𝑟)
27 opelxp2 5565 . . . . . . . . . . . . . . . 16 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) → 𝐴𝑠)
2827ad2antrl 727 . . . . . . . . . . . . . . 15 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → 𝐴𝑠)
2928snssd 4705 . . . . . . . . . . . . . 14 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → {𝐴} ⊆ 𝑠)
30 xpss2 5543 . . . . . . . . . . . . . 14 ({𝐴} ⊆ 𝑠 → (𝑟 × {𝐴}) ⊆ (𝑟 × 𝑠))
3129, 30syl 17 . . . . . . . . . . . . 13 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → (𝑟 × {𝐴}) ⊆ (𝑟 × 𝑠))
32 simprr 772 . . . . . . . . . . . . 13 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → (𝑟 × 𝑠) ⊆ 𝑘)
3331, 32sstrd 3928 . . . . . . . . . . . 12 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → (𝑟 × {𝐴}) ⊆ 𝑘)
3426, 33jca 515 . . . . . . . . . . 11 ((((𝜑𝑥𝑋) ∧ 𝑘𝑊) ∧ (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘)) → (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘))
3534ex 416 . . . . . . . . . 10 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → ((⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) → (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘)))
3635rexlimdvw 3252 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → (∃𝑠𝑆 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) → (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘)))
3736reximdv 3235 . . . . . . . 8 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → (∃𝑟𝑅𝑠𝑆 (⟨𝑥, 𝐴⟩ ∈ (𝑟 × 𝑠) ∧ (𝑟 × 𝑠) ⊆ 𝑘) → ∃𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘)))
3824, 37syld 47 . . . . . . 7 (((𝜑𝑥𝑋) ∧ 𝑘𝑊) → (⟨𝑥, 𝐴⟩ ∈ 𝑘 → ∃𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘)))
3938reximdva 3236 . . . . . 6 ((𝜑𝑥𝑋) → (∃𝑘𝑊𝑥, 𝐴⟩ ∈ 𝑘 → ∃𝑘𝑊𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘)))
4010, 39mpd 15 . . . . 5 ((𝜑𝑥𝑋) → ∃𝑘𝑊𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘))
41 rexcom 3311 . . . . . 6 (∃𝑘𝑊𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘) ↔ ∃𝑟𝑅𝑘𝑊 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘))
42 r19.42v 3306 . . . . . . 7 (∃𝑘𝑊 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘) ↔ (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘))
4342rexbii 3213 . . . . . 6 (∃𝑟𝑅𝑘𝑊 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘) ↔ ∃𝑟𝑅 (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘))
4441, 43bitri 278 . . . . 5 (∃𝑘𝑊𝑟𝑅 (𝑥𝑟 ∧ (𝑟 × {𝐴}) ⊆ 𝑘) ↔ ∃𝑟𝑅 (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘))
4540, 44sylib 221 . . . 4 ((𝜑𝑥𝑋) → ∃𝑟𝑅 (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘))
4645ralrimiva 3152 . . 3 (𝜑 → ∀𝑥𝑋𝑟𝑅 (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘))
47 txcmp.x . . . 4 𝑋 = 𝑅
48 sseq2 3944 . . . 4 (𝑘 = (𝑓𝑟) → ((𝑟 × {𝐴}) ⊆ 𝑘 ↔ (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))
4947, 48cmpcovf 21999 . . 3 ((𝑅 ∈ Comp ∧ ∀𝑥𝑋𝑟𝑅 (𝑥𝑟 ∧ ∃𝑘𝑊 (𝑟 × {𝐴}) ⊆ 𝑘)) → ∃𝑡 ∈ (𝒫 𝑅 ∩ Fin)(𝑋 = 𝑡 ∧ ∃𝑓(𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟))))
501, 46, 49syl2anc 587 . 2 (𝜑 → ∃𝑡 ∈ (𝒫 𝑅 ∩ Fin)(𝑋 = 𝑡 ∧ ∃𝑓(𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟))))
51 txcmp.y . . . . . . . 8 𝑌 = 𝑆
521ad2antrr 725 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑅 ∈ Comp)
53 cmptop 22003 . . . . . . . . . 10 (𝑆 ∈ Comp → 𝑆 ∈ Top)
5414, 53syl 17 . . . . . . . . 9 (𝜑𝑆 ∈ Top)
5554ad2antrr 725 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑆 ∈ Top)
56 cmptop 22003 . . . . . . . . . . 11 (𝑅 ∈ Comp → 𝑅 ∈ Top)
5752, 56syl 17 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑅 ∈ Top)
58 txtop 22177 . . . . . . . . . 10 ((𝑅 ∈ Top ∧ 𝑆 ∈ Top) → (𝑅 ×t 𝑆) ∈ Top)
5957, 55, 58syl2anc 587 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → (𝑅 ×t 𝑆) ∈ Top)
60 simprrl 780 . . . . . . . . . . 11 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑓:𝑡𝑊)
6160frnd 6498 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓𝑊)
6211ad2antrr 725 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑊 ⊆ (𝑅 ×t 𝑆))
6361, 62sstrd 3928 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓 ⊆ (𝑅 ×t 𝑆))
64 uniopn 21505 . . . . . . . . 9 (((𝑅 ×t 𝑆) ∈ Top ∧ ran 𝑓 ⊆ (𝑅 ×t 𝑆)) → ran 𝑓 ∈ (𝑅 ×t 𝑆))
6559, 63, 64syl2anc 587 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓 ∈ (𝑅 ×t 𝑆))
66 simprrr 781 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟))
67 ss2iun 4902 . . . . . . . . . 10 (∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟) → 𝑟𝑡 (𝑟 × {𝐴}) ⊆ 𝑟𝑡 (𝑓𝑟))
6866, 67syl 17 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑟𝑡 (𝑟 × {𝐴}) ⊆ 𝑟𝑡 (𝑓𝑟))
69 simprl 770 . . . . . . . . . . . 12 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑋 = 𝑡)
70 uniiun 4948 . . . . . . . . . . . 12 𝑡 = 𝑟𝑡 𝑟
7169, 70eqtrdi 2852 . . . . . . . . . . 11 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑋 = 𝑟𝑡 𝑟)
7271xpeq1d 5552 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → (𝑋 × {𝐴}) = ( 𝑟𝑡 𝑟 × {𝐴}))
73 xpiundir 5591 . . . . . . . . . 10 ( 𝑟𝑡 𝑟 × {𝐴}) = 𝑟𝑡 (𝑟 × {𝐴})
7472, 73eqtr2di 2853 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑟𝑡 (𝑟 × {𝐴}) = (𝑋 × {𝐴}))
7560ffnd 6492 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑓 Fn 𝑡)
76 fniunfv 6988 . . . . . . . . . 10 (𝑓 Fn 𝑡 𝑟𝑡 (𝑓𝑟) = ran 𝑓)
7775, 76syl 17 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑟𝑡 (𝑓𝑟) = ran 𝑓)
7868, 74, 773sstr3d 3964 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → (𝑋 × {𝐴}) ⊆ ran 𝑓)
793ad2antrr 725 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝐴𝑌)
8047, 51, 52, 55, 65, 78, 79txtube 22248 . . . . . . 7 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ∃𝑢𝑆 (𝐴𝑢 ∧ (𝑋 × 𝑢) ⊆ ran 𝑓))
81 vex 3447 . . . . . . . . . . . . . 14 𝑓 ∈ V
8281rnex 7603 . . . . . . . . . . . . 13 ran 𝑓 ∈ V
8382elpw 4504 . . . . . . . . . . . 12 (ran 𝑓 ∈ 𝒫 𝑊 ↔ ran 𝑓𝑊)
8461, 83sylibr 237 . . . . . . . . . . 11 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓 ∈ 𝒫 𝑊)
85 simplr 768 . . . . . . . . . . . . 13 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑡 ∈ (𝒫 𝑅 ∩ Fin))
8685elin2d 4129 . . . . . . . . . . . 12 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑡 ∈ Fin)
87 dffn4 6575 . . . . . . . . . . . . 13 (𝑓 Fn 𝑡𝑓:𝑡onto→ran 𝑓)
8875, 87sylib 221 . . . . . . . . . . . 12 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → 𝑓:𝑡onto→ran 𝑓)
89 fofi 8798 . . . . . . . . . . . 12 ((𝑡 ∈ Fin ∧ 𝑓:𝑡onto→ran 𝑓) → ran 𝑓 ∈ Fin)
9086, 88, 89syl2anc 587 . . . . . . . . . . 11 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓 ∈ Fin)
9184, 90elind 4124 . . . . . . . . . 10 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ran 𝑓 ∈ (𝒫 𝑊 ∩ Fin))
92 unieq 4814 . . . . . . . . . . . . 13 (𝑣 = ran 𝑓 𝑣 = ran 𝑓)
9392sseq2d 3950 . . . . . . . . . . . 12 (𝑣 = ran 𝑓 → ((𝑋 × 𝑢) ⊆ 𝑣 ↔ (𝑋 × 𝑢) ⊆ ran 𝑓))
9493rspcev 3574 . . . . . . . . . . 11 ((ran 𝑓 ∈ (𝒫 𝑊 ∩ Fin) ∧ (𝑋 × 𝑢) ⊆ ran 𝑓) → ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)
9594ex 416 . . . . . . . . . 10 (ran 𝑓 ∈ (𝒫 𝑊 ∩ Fin) → ((𝑋 × 𝑢) ⊆ ran 𝑓 → ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣))
9691, 95syl 17 . . . . . . . . 9 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ((𝑋 × 𝑢) ⊆ ran 𝑓 → ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣))
9796anim2d 614 . . . . . . . 8 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ((𝐴𝑢 ∧ (𝑋 × 𝑢) ⊆ ran 𝑓) → (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
9897reximdv 3235 . . . . . . 7 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → (∃𝑢𝑆 (𝐴𝑢 ∧ (𝑋 × 𝑢) ⊆ ran 𝑓) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
9980, 98mpd 15 . . . . . 6 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ (𝑋 = 𝑡 ∧ (𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)))) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣))
10099expr 460 . . . . 5 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ 𝑋 = 𝑡) → ((𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
101100exlimdv 1934 . . . 4 (((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) ∧ 𝑋 = 𝑡) → (∃𝑓(𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟)) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
102101expimpd 457 . . 3 ((𝜑𝑡 ∈ (𝒫 𝑅 ∩ Fin)) → ((𝑋 = 𝑡 ∧ ∃𝑓(𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟))) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
103102rexlimdva 3246 . 2 (𝜑 → (∃𝑡 ∈ (𝒫 𝑅 ∩ Fin)(𝑋 = 𝑡 ∧ ∃𝑓(𝑓:𝑡𝑊 ∧ ∀𝑟𝑡 (𝑟 × {𝐴}) ⊆ (𝑓𝑟))) → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣)))
10450, 103mpd 15 1 (𝜑 → ∃𝑢𝑆 (𝐴𝑢 ∧ ∃𝑣 ∈ (𝒫 𝑊 ∩ Fin)(𝑋 × 𝑢) ⊆ 𝑣))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1538  ∃wex 1781   ∈ wcel 2112  ∀wral 3109  ∃wrex 3110   ∩ cin 3883   ⊆ wss 3884  𝒫 cpw 4500  {csn 4528  ⟨cop 4534  ∪ cuni 4803  ∪ ciun 4884   × cxp 5521  ran crn 5524   Fn wfn 6323  ⟶wf 6324  –onto→wfo 6326  ‘cfv 6328  (class class class)co 7139  Fincfn 8496  Topctop 21501  Compccmp 21994   ×t ctx 22168 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 1911  ax-6 1970  ax-7 2015  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2773  ax-sep 5170  ax-nul 5177  ax-pow 5234  ax-pr 5298  ax-un 7445 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2601  df-eu 2632  df-clab 2780  df-cleq 2794  df-clel 2873  df-nfc 2941  df-ne 2991  df-ral 3114  df-rex 3115  df-reu 3116  df-rab 3118  df-v 3446  df-sbc 3724  df-csb 3832  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-pss 3903  df-nul 4247  df-if 4429  df-pw 4502  df-sn 4529  df-pr 4531  df-tp 4533  df-op 4535  df-uni 4804  df-int 4842  df-iun 4886  df-iin 4887  df-br 5034  df-opab 5096  df-mpt 5114  df-tr 5140  df-id 5428  df-eprel 5433  df-po 5442  df-so 5443  df-fr 5482  df-we 5484  df-xp 5529  df-rel 5530  df-cnv 5531  df-co 5532  df-dm 5533  df-rn 5534  df-res 5535  df-ima 5536  df-pred 6120  df-ord 6166  df-on 6167  df-lim 6168  df-suc 6169  df-iota 6287  df-fun 6330  df-fn 6331  df-f 6332  df-f1 6333  df-fo 6334  df-f1o 6335  df-fv 6336  df-ov 7142  df-oprab 7143  df-mpo 7144  df-om 7565  df-1st 7675  df-2nd 7676  df-wrecs 7934  df-recs 7995  df-rdg 8033  df-1o 8089  df-oadd 8093  df-er 8276  df-en 8497  df-dom 8498  df-fin 8500  df-topgen 16712  df-top 21502  df-bases 21554  df-cmp 21995  df-tx 22170 This theorem is referenced by:  txcmplem2  22250
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