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Theorem 2ndcomap 21166
Description: A surjective continuous open map maps second-countable spaces to second-countable spaces. (Contributed by Mario Carneiro, 9-Apr-2015.)
Hypotheses
Ref Expression
2ndcomap.2 𝑌 = 𝐾
2ndcomap.3 (𝜑𝐽 ∈ 2nd𝜔)
2ndcomap.5 (𝜑𝐹 ∈ (𝐽 Cn 𝐾))
2ndcomap.6 (𝜑 → ran 𝐹 = 𝑌)
2ndcomap.7 ((𝜑𝑥𝐽) → (𝐹𝑥) ∈ 𝐾)
Assertion
Ref Expression
2ndcomap (𝜑𝐾 ∈ 2nd𝜔)
Distinct variable groups:   𝑥,𝐹   𝑥,𝐽   𝜑,𝑥   𝑥,𝐾
Allowed substitution hint:   𝑌(𝑥)

Proof of Theorem 2ndcomap
Dummy variables 𝑘 𝑚 𝑡 𝑤 𝑧 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 2ndcomap.5 . . . . . 6 (𝜑𝐹 ∈ (𝐽 Cn 𝐾))
2 cntop2 20950 . . . . . 6 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
31, 2syl 17 . . . . 5 (𝜑𝐾 ∈ Top)
43ad2antrr 761 . . . 4 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝐾 ∈ Top)
5 simplll 797 . . . . . . 7 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ 𝑥𝑏) → 𝜑)
6 bastg 20676 . . . . . . . . . 10 (𝑏 ∈ TopBases → 𝑏 ⊆ (topGen‘𝑏))
76ad2antlr 762 . . . . . . . . 9 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝑏 ⊆ (topGen‘𝑏))
8 simprr 795 . . . . . . . . 9 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (topGen‘𝑏) = 𝐽)
97, 8sseqtrd 3625 . . . . . . . 8 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝑏𝐽)
109sselda 3588 . . . . . . 7 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ 𝑥𝑏) → 𝑥𝐽)
11 2ndcomap.7 . . . . . . 7 ((𝜑𝑥𝐽) → (𝐹𝑥) ∈ 𝐾)
125, 10, 11syl2anc 692 . . . . . 6 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ 𝑥𝑏) → (𝐹𝑥) ∈ 𝐾)
13 eqid 2626 . . . . . 6 (𝑥𝑏 ↦ (𝐹𝑥)) = (𝑥𝑏 ↦ (𝐹𝑥))
1412, 13fmptd 6341 . . . . 5 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (𝑥𝑏 ↦ (𝐹𝑥)):𝑏𝐾)
15 frn 6012 . . . . 5 ((𝑥𝑏 ↦ (𝐹𝑥)):𝑏𝐾 → ran (𝑥𝑏 ↦ (𝐹𝑥)) ⊆ 𝐾)
1614, 15syl 17 . . . 4 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ⊆ 𝐾)
17 elunii 4412 . . . . . . . . . . 11 ((𝑧𝑘𝑘𝐾) → 𝑧 𝐾)
18 2ndcomap.2 . . . . . . . . . . 11 𝑌 = 𝐾
1917, 18syl6eleqr 2715 . . . . . . . . . 10 ((𝑧𝑘𝑘𝐾) → 𝑧𝑌)
2019ancoms 469 . . . . . . . . 9 ((𝑘𝐾𝑧𝑘) → 𝑧𝑌)
2120adantl 482 . . . . . . . 8 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → 𝑧𝑌)
22 2ndcomap.6 . . . . . . . . 9 (𝜑 → ran 𝐹 = 𝑌)
2322ad3antrrr 765 . . . . . . . 8 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → ran 𝐹 = 𝑌)
2421, 23eleqtrrd 2707 . . . . . . 7 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → 𝑧 ∈ ran 𝐹)
25 eqid 2626 . . . . . . . . . . 11 𝐽 = 𝐽
2625, 18cnf 20955 . . . . . . . . . 10 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹: 𝐽𝑌)
271, 26syl 17 . . . . . . . . 9 (𝜑𝐹: 𝐽𝑌)
2827ad3antrrr 765 . . . . . . . 8 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → 𝐹: 𝐽𝑌)
29 ffn 6004 . . . . . . . 8 (𝐹: 𝐽𝑌𝐹 Fn 𝐽)
30 fvelrnb 6201 . . . . . . . 8 (𝐹 Fn 𝐽 → (𝑧 ∈ ran 𝐹 ↔ ∃𝑡 𝐽(𝐹𝑡) = 𝑧))
3128, 29, 303syl 18 . . . . . . 7 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → (𝑧 ∈ ran 𝐹 ↔ ∃𝑡 𝐽(𝐹𝑡) = 𝑧))
3224, 31mpbid 222 . . . . . 6 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → ∃𝑡 𝐽(𝐹𝑡) = 𝑧)
331ad3antrrr 765 . . . . . . . . . . 11 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝐹 ∈ (𝐽 Cn 𝐾))
34 simprll 801 . . . . . . . . . . 11 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝑘𝐾)
35 cnima 20974 . . . . . . . . . . 11 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑘𝐾) → (𝐹𝑘) ∈ 𝐽)
3633, 34, 35syl2anc 692 . . . . . . . . . 10 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (𝐹𝑘) ∈ 𝐽)
378adantr 481 . . . . . . . . . 10 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (topGen‘𝑏) = 𝐽)
3836, 37eleqtrrd 2707 . . . . . . . . 9 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (𝐹𝑘) ∈ (topGen‘𝑏))
39 simprrl 803 . . . . . . . . . 10 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝑡 𝐽)
40 simprrr 804 . . . . . . . . . . 11 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (𝐹𝑡) = 𝑧)
41 simprlr 802 . . . . . . . . . . 11 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝑧𝑘)
4240, 41eqeltrd 2704 . . . . . . . . . 10 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (𝐹𝑡) ∈ 𝑘)
4328, 29syl 17 . . . . . . . . . . . 12 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → 𝐹 Fn 𝐽)
4443adantrr 752 . . . . . . . . . . 11 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝐹 Fn 𝐽)
45 elpreima 6294 . . . . . . . . . . 11 (𝐹 Fn 𝐽 → (𝑡 ∈ (𝐹𝑘) ↔ (𝑡 𝐽 ∧ (𝐹𝑡) ∈ 𝑘)))
4644, 45syl 17 . . . . . . . . . 10 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → (𝑡 ∈ (𝐹𝑘) ↔ (𝑡 𝐽 ∧ (𝐹𝑡) ∈ 𝑘)))
4739, 42, 46mpbir2and 956 . . . . . . . . 9 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → 𝑡 ∈ (𝐹𝑘))
48 tg2 20675 . . . . . . . . 9 (((𝐹𝑘) ∈ (topGen‘𝑏) ∧ 𝑡 ∈ (𝐹𝑘)) → ∃𝑚𝑏 (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))
4938, 47, 48syl2anc 692 . . . . . . . 8 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → ∃𝑚𝑏 (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))
50 simprl 793 . . . . . . . . . . 11 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝑚𝑏)
51 eqid 2626 . . . . . . . . . . 11 (𝐹𝑚) = (𝐹𝑚)
52 imaeq2 5425 . . . . . . . . . . . . 13 (𝑥 = 𝑚 → (𝐹𝑥) = (𝐹𝑚))
5352eqeq2d 2636 . . . . . . . . . . . 12 (𝑥 = 𝑚 → ((𝐹𝑚) = (𝐹𝑥) ↔ (𝐹𝑚) = (𝐹𝑚)))
5453rspcev 3300 . . . . . . . . . . 11 ((𝑚𝑏 ∧ (𝐹𝑚) = (𝐹𝑚)) → ∃𝑥𝑏 (𝐹𝑚) = (𝐹𝑥))
5550, 51, 54sylancl 693 . . . . . . . . . 10 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → ∃𝑥𝑏 (𝐹𝑚) = (𝐹𝑥))
5644adantr 481 . . . . . . . . . . . . . 14 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝐹 Fn 𝐽)
57 fnfun 5948 . . . . . . . . . . . . . 14 (𝐹 Fn 𝐽 → Fun 𝐹)
5856, 57syl 17 . . . . . . . . . . . . 13 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → Fun 𝐹)
59 simprrr 804 . . . . . . . . . . . . 13 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝑚 ⊆ (𝐹𝑘))
60 funimass2 5932 . . . . . . . . . . . . 13 ((Fun 𝐹𝑚 ⊆ (𝐹𝑘)) → (𝐹𝑚) ⊆ 𝑘)
6158, 59, 60syl2anc 692 . . . . . . . . . . . 12 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝐹𝑚) ⊆ 𝑘)
62 vex 3194 . . . . . . . . . . . 12 𝑘 ∈ V
63 ssexg 4769 . . . . . . . . . . . 12 (((𝐹𝑚) ⊆ 𝑘𝑘 ∈ V) → (𝐹𝑚) ∈ V)
6461, 62, 63sylancl 693 . . . . . . . . . . 11 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝐹𝑚) ∈ V)
6513elrnmpt 5336 . . . . . . . . . . 11 ((𝐹𝑚) ∈ V → ((𝐹𝑚) ∈ ran (𝑥𝑏 ↦ (𝐹𝑥)) ↔ ∃𝑥𝑏 (𝐹𝑚) = (𝐹𝑥)))
6664, 65syl 17 . . . . . . . . . 10 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → ((𝐹𝑚) ∈ ran (𝑥𝑏 ↦ (𝐹𝑥)) ↔ ∃𝑥𝑏 (𝐹𝑚) = (𝐹𝑥)))
6755, 66mpbird 247 . . . . . . . . 9 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝐹𝑚) ∈ ran (𝑥𝑏 ↦ (𝐹𝑥)))
6840adantr 481 . . . . . . . . . 10 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝐹𝑡) = 𝑧)
69 simprrl 803 . . . . . . . . . . 11 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝑡𝑚)
70 cnvimass 5448 . . . . . . . . . . . . 13 (𝐹𝑘) ⊆ dom 𝐹
7159, 70syl6ss 3600 . . . . . . . . . . . 12 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝑚 ⊆ dom 𝐹)
72 funfvima2 6448 . . . . . . . . . . . 12 ((Fun 𝐹𝑚 ⊆ dom 𝐹) → (𝑡𝑚 → (𝐹𝑡) ∈ (𝐹𝑚)))
7358, 71, 72syl2anc 692 . . . . . . . . . . 11 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝑡𝑚 → (𝐹𝑡) ∈ (𝐹𝑚)))
7469, 73mpd 15 . . . . . . . . . 10 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → (𝐹𝑡) ∈ (𝐹𝑚))
7568, 74eqeltrrd 2705 . . . . . . . . 9 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → 𝑧 ∈ (𝐹𝑚))
76 eleq2 2693 . . . . . . . . . . 11 (𝑤 = (𝐹𝑚) → (𝑧𝑤𝑧 ∈ (𝐹𝑚)))
77 sseq1 3610 . . . . . . . . . . 11 (𝑤 = (𝐹𝑚) → (𝑤𝑘 ↔ (𝐹𝑚) ⊆ 𝑘))
7876, 77anbi12d 746 . . . . . . . . . 10 (𝑤 = (𝐹𝑚) → ((𝑧𝑤𝑤𝑘) ↔ (𝑧 ∈ (𝐹𝑚) ∧ (𝐹𝑚) ⊆ 𝑘)))
7978rspcev 3300 . . . . . . . . 9 (((𝐹𝑚) ∈ ran (𝑥𝑏 ↦ (𝐹𝑥)) ∧ (𝑧 ∈ (𝐹𝑚) ∧ (𝐹𝑚) ⊆ 𝑘)) → ∃𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
8067, 75, 61, 79syl12anc 1321 . . . . . . . 8 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) ∧ (𝑚𝑏 ∧ (𝑡𝑚𝑚 ⊆ (𝐹𝑘)))) → ∃𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
8149, 80rexlimddv 3033 . . . . . . 7 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ ((𝑘𝐾𝑧𝑘) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧))) → ∃𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
8281anassrs 679 . . . . . 6 (((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) ∧ (𝑡 𝐽 ∧ (𝐹𝑡) = 𝑧)) → ∃𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
8332, 82rexlimddv 3033 . . . . 5 ((((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) ∧ (𝑘𝐾𝑧𝑘)) → ∃𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
8483ralrimivva 2970 . . . 4 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → ∀𝑘𝐾𝑧𝑘𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘))
85 basgen2 20699 . . . 4 ((𝐾 ∈ Top ∧ ran (𝑥𝑏 ↦ (𝐹𝑥)) ⊆ 𝐾 ∧ ∀𝑘𝐾𝑧𝑘𝑤 ∈ ran (𝑥𝑏 ↦ (𝐹𝑥))(𝑧𝑤𝑤𝑘)) → (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) = 𝐾)
864, 16, 84, 85syl3anc 1323 . . 3 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) = 𝐾)
8786, 4eqeltrd 2704 . . . . 5 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) ∈ Top)
88 tgclb 20680 . . . . 5 (ran (𝑥𝑏 ↦ (𝐹𝑥)) ∈ TopBases ↔ (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) ∈ Top)
8987, 88sylibr 224 . . . 4 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ∈ TopBases)
90 omelon 8488 . . . . . . 7 ω ∈ On
91 simprl 793 . . . . . . 7 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝑏 ≼ ω)
92 ondomen 8805 . . . . . . 7 ((ω ∈ On ∧ 𝑏 ≼ ω) → 𝑏 ∈ dom card)
9390, 91, 92sylancr 694 . . . . . 6 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝑏 ∈ dom card)
94 ffn 6004 . . . . . . . 8 ((𝑥𝑏 ↦ (𝐹𝑥)):𝑏𝐾 → (𝑥𝑏 ↦ (𝐹𝑥)) Fn 𝑏)
9514, 94syl 17 . . . . . . 7 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (𝑥𝑏 ↦ (𝐹𝑥)) Fn 𝑏)
96 dffn4 6080 . . . . . . 7 ((𝑥𝑏 ↦ (𝐹𝑥)) Fn 𝑏 ↔ (𝑥𝑏 ↦ (𝐹𝑥)):𝑏onto→ran (𝑥𝑏 ↦ (𝐹𝑥)))
9795, 96sylib 208 . . . . . 6 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (𝑥𝑏 ↦ (𝐹𝑥)):𝑏onto→ran (𝑥𝑏 ↦ (𝐹𝑥)))
98 fodomnum 8825 . . . . . 6 (𝑏 ∈ dom card → ((𝑥𝑏 ↦ (𝐹𝑥)):𝑏onto→ran (𝑥𝑏 ↦ (𝐹𝑥)) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ 𝑏))
9993, 97, 98sylc 65 . . . . 5 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ 𝑏)
100 domtr 7954 . . . . 5 ((ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ 𝑏𝑏 ≼ ω) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ ω)
10199, 91, 100syl2anc 692 . . . 4 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ ω)
102 2ndci 21156 . . . 4 ((ran (𝑥𝑏 ↦ (𝐹𝑥)) ∈ TopBases ∧ ran (𝑥𝑏 ↦ (𝐹𝑥)) ≼ ω) → (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) ∈ 2nd𝜔)
10389, 101, 102syl2anc 692 . . 3 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → (topGen‘ran (𝑥𝑏 ↦ (𝐹𝑥))) ∈ 2nd𝜔)
10486, 103eqeltrrd 2705 . 2 (((𝜑𝑏 ∈ TopBases) ∧ (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽)) → 𝐾 ∈ 2nd𝜔)
105 2ndcomap.3 . . 3 (𝜑𝐽 ∈ 2nd𝜔)
106 is2ndc 21154 . . 3 (𝐽 ∈ 2nd𝜔 ↔ ∃𝑏 ∈ TopBases (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽))
107105, 106sylib 208 . 2 (𝜑 → ∃𝑏 ∈ TopBases (𝑏 ≼ ω ∧ (topGen‘𝑏) = 𝐽))
108104, 107r19.29a 3076 1 (𝜑𝐾 ∈ 2nd𝜔)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384   = wceq 1480  wcel 1992  wral 2912  wrex 2913  Vcvv 3191  wss 3560   cuni 4407   class class class wbr 4618  cmpt 4678  ccnv 5078  dom cdm 5079  ran crn 5080  cima 5082  Oncon0 5685  Fun wfun 5844   Fn wfn 5845  wf 5846  ontowfo 5848  cfv 5850  (class class class)co 6605  ωcom 7013  cdom 7898  cardccrd 8706  topGenctg 16014  Topctop 20612  TopBasesctb 20615   Cn ccn 20933  2nd𝜔c2ndc 21146
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1841  ax-6 1890  ax-7 1937  ax-8 1994  ax-9 2001  ax-10 2021  ax-11 2036  ax-12 2049  ax-13 2250  ax-ext 2606  ax-rep 4736  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6903  ax-inf2 8483
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1883  df-eu 2478  df-mo 2479  df-clab 2613  df-cleq 2619  df-clel 2622  df-nfc 2756  df-ne 2797  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3193  df-sbc 3423  df-csb 3520  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-pss 3576  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-int 4446  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-se 5039  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5642  df-ord 5688  df-on 5689  df-lim 5690  df-suc 5691  df-iota 5813  df-fun 5852  df-fn 5853  df-f 5854  df-f1 5855  df-fo 5856  df-f1o 5857  df-fv 5858  df-isom 5859  df-riota 6566  df-ov 6608  df-oprab 6609  df-mpt2 6610  df-om 7014  df-1st 7116  df-2nd 7117  df-wrecs 7353  df-recs 7414  df-er 7688  df-map 7805  df-en 7901  df-dom 7902  df-card 8710  df-acn 8713  df-topgen 16020  df-top 20616  df-bases 20617  df-topon 20618  df-cn 20936  df-2ndc 21148
This theorem is referenced by: (None)
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