MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  qtopeu Structured version   Visualization version   GIF version

Theorem qtopeu 21424
Description: Universal property of the quotient topology. If 𝐺 is a function from 𝐽 to 𝐾 which is equal on all equivalent elements under 𝐹, then there is a unique continuous map 𝑓:(𝐽 / 𝐹)⟶𝐾 such that 𝐺 = 𝑓𝐹, and we say that 𝐺 "passes to the quotient". (Contributed by Mario Carneiro, 24-Mar-2015.)
Hypotheses
Ref Expression
qtopeu.1 (𝜑𝐽 ∈ (TopOn‘𝑋))
qtopeu.3 (𝜑𝐹:𝑋onto𝑌)
qtopeu.4 (𝜑𝐺 ∈ (𝐽 Cn 𝐾))
qtopeu.5 ((𝜑 ∧ (𝑥𝑋𝑦𝑋 ∧ (𝐹𝑥) = (𝐹𝑦))) → (𝐺𝑥) = (𝐺𝑦))
Assertion
Ref Expression
qtopeu (𝜑 → ∃!𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹))
Distinct variable groups:   𝑥,𝑓,𝑦,𝐹   𝑓,𝐽,𝑥   𝑓,𝐾,𝑥   𝑥,𝑋,𝑦   𝑓,𝐺,𝑥,𝑦   𝜑,𝑓,𝑥,𝑦   𝑓,𝑌,𝑥
Allowed substitution hints:   𝐽(𝑦)   𝐾(𝑦)   𝑋(𝑓)   𝑌(𝑦)

Proof of Theorem qtopeu
Dummy variables 𝑔 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 qtopeu.3 . . . . . . . . . . . . . . . 16 (𝜑𝐹:𝑋onto𝑌)
2 fofn 6076 . . . . . . . . . . . . . . . 16 (𝐹:𝑋onto𝑌𝐹 Fn 𝑋)
31, 2syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐹 Fn 𝑋)
43adantr 481 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → 𝐹 Fn 𝑋)
5 fniniseg 6295 . . . . . . . . . . . . . 14 (𝐹 Fn 𝑋 → (𝑦 ∈ (𝐹 “ {(𝐹𝑥)}) ↔ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥))))
64, 5syl 17 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → (𝑦 ∈ (𝐹 “ {(𝐹𝑥)}) ↔ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥))))
7 eqcom 2633 . . . . . . . . . . . . . . . . . 18 ((𝐹𝑥) = (𝐹𝑦) ↔ (𝐹𝑦) = (𝐹𝑥))
873anbi3i 1253 . . . . . . . . . . . . . . . . 17 ((𝑥𝑋𝑦𝑋 ∧ (𝐹𝑥) = (𝐹𝑦)) ↔ (𝑥𝑋𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥)))
9 3anass 1040 . . . . . . . . . . . . . . . . 17 ((𝑥𝑋𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥)) ↔ (𝑥𝑋 ∧ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥))))
108, 9bitri 264 . . . . . . . . . . . . . . . 16 ((𝑥𝑋𝑦𝑋 ∧ (𝐹𝑥) = (𝐹𝑦)) ↔ (𝑥𝑋 ∧ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥))))
11 qtopeu.5 . . . . . . . . . . . . . . . 16 ((𝜑 ∧ (𝑥𝑋𝑦𝑋 ∧ (𝐹𝑥) = (𝐹𝑦))) → (𝐺𝑥) = (𝐺𝑦))
1210, 11sylan2br 493 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑥𝑋 ∧ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥)))) → (𝐺𝑥) = (𝐺𝑦))
1312eqcomd 2632 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑥𝑋 ∧ (𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥)))) → (𝐺𝑦) = (𝐺𝑥))
1413expr 642 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → ((𝑦𝑋 ∧ (𝐹𝑦) = (𝐹𝑥)) → (𝐺𝑦) = (𝐺𝑥)))
156, 14sylbid 230 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → (𝑦 ∈ (𝐹 “ {(𝐹𝑥)}) → (𝐺𝑦) = (𝐺𝑥)))
1615ralrimiv 2964 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → ∀𝑦 ∈ (𝐹 “ {(𝐹𝑥)})(𝐺𝑦) = (𝐺𝑥))
17 qtopeu.1 . . . . . . . . . . . . . . 15 (𝜑𝐽 ∈ (TopOn‘𝑋))
18 qtopeu.4 . . . . . . . . . . . . . . . . 17 (𝜑𝐺 ∈ (𝐽 Cn 𝐾))
19 cntop2 20950 . . . . . . . . . . . . . . . . 17 (𝐺 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
2018, 19syl 17 . . . . . . . . . . . . . . . 16 (𝜑𝐾 ∈ Top)
21 eqid 2626 . . . . . . . . . . . . . . . . 17 𝐾 = 𝐾
2221toptopon 20643 . . . . . . . . . . . . . . . 16 (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘ 𝐾))
2320, 22sylib 208 . . . . . . . . . . . . . . 15 (𝜑𝐾 ∈ (TopOn‘ 𝐾))
24 cnf2 20958 . . . . . . . . . . . . . . 15 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘ 𝐾) ∧ 𝐺 ∈ (𝐽 Cn 𝐾)) → 𝐺:𝑋 𝐾)
2517, 23, 18, 24syl3anc 1323 . . . . . . . . . . . . . 14 (𝜑𝐺:𝑋 𝐾)
26 ffn 6004 . . . . . . . . . . . . . 14 (𝐺:𝑋 𝐾𝐺 Fn 𝑋)
2725, 26syl 17 . . . . . . . . . . . . 13 (𝜑𝐺 Fn 𝑋)
2827adantr 481 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → 𝐺 Fn 𝑋)
29 cnvimass 5448 . . . . . . . . . . . . 13 (𝐹 “ {(𝐹𝑥)}) ⊆ dom 𝐹
30 fof 6074 . . . . . . . . . . . . . . . 16 (𝐹:𝑋onto𝑌𝐹:𝑋𝑌)
311, 30syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐹:𝑋𝑌)
32 fdm 6010 . . . . . . . . . . . . . . 15 (𝐹:𝑋𝑌 → dom 𝐹 = 𝑋)
3331, 32syl 17 . . . . . . . . . . . . . 14 (𝜑 → dom 𝐹 = 𝑋)
3433adantr 481 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → dom 𝐹 = 𝑋)
3529, 34syl5sseq 3637 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → (𝐹 “ {(𝐹𝑥)}) ⊆ 𝑋)
36 eqeq1 2630 . . . . . . . . . . . . 13 (𝑤 = (𝐺𝑦) → (𝑤 = (𝐺𝑥) ↔ (𝐺𝑦) = (𝐺𝑥)))
3736ralima 6453 . . . . . . . . . . . 12 ((𝐺 Fn 𝑋 ∧ (𝐹 “ {(𝐹𝑥)}) ⊆ 𝑋) → (∀𝑤 ∈ (𝐺 “ (𝐹 “ {(𝐹𝑥)}))𝑤 = (𝐺𝑥) ↔ ∀𝑦 ∈ (𝐹 “ {(𝐹𝑥)})(𝐺𝑦) = (𝐺𝑥)))
3828, 35, 37syl2anc 692 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → (∀𝑤 ∈ (𝐺 “ (𝐹 “ {(𝐹𝑥)}))𝑤 = (𝐺𝑥) ↔ ∀𝑦 ∈ (𝐹 “ {(𝐹𝑥)})(𝐺𝑦) = (𝐺𝑥)))
3916, 38mpbird 247 . . . . . . . . . 10 ((𝜑𝑥𝑋) → ∀𝑤 ∈ (𝐺 “ (𝐹 “ {(𝐹𝑥)}))𝑤 = (𝐺𝑥))
40 fdm 6010 . . . . . . . . . . . . . . . 16 (𝐺:𝑋 𝐾 → dom 𝐺 = 𝑋)
4125, 40syl 17 . . . . . . . . . . . . . . 15 (𝜑 → dom 𝐺 = 𝑋)
4241eleq2d 2689 . . . . . . . . . . . . . 14 (𝜑 → (𝑥 ∈ dom 𝐺𝑥𝑋))
4342biimpar 502 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → 𝑥 ∈ dom 𝐺)
44 simpr 477 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → 𝑥𝑋)
45 eqidd 2627 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → (𝐹𝑥) = (𝐹𝑥))
46 fniniseg 6295 . . . . . . . . . . . . . . 15 (𝐹 Fn 𝑋 → (𝑥 ∈ (𝐹 “ {(𝐹𝑥)}) ↔ (𝑥𝑋 ∧ (𝐹𝑥) = (𝐹𝑥))))
474, 46syl 17 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → (𝑥 ∈ (𝐹 “ {(𝐹𝑥)}) ↔ (𝑥𝑋 ∧ (𝐹𝑥) = (𝐹𝑥))))
4844, 45, 47mpbir2and 956 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → 𝑥 ∈ (𝐹 “ {(𝐹𝑥)}))
49 inelcm 4009 . . . . . . . . . . . . 13 ((𝑥 ∈ dom 𝐺𝑥 ∈ (𝐹 “ {(𝐹𝑥)})) → (dom 𝐺 ∩ (𝐹 “ {(𝐹𝑥)})) ≠ ∅)
5043, 48, 49syl2anc 692 . . . . . . . . . . . 12 ((𝜑𝑥𝑋) → (dom 𝐺 ∩ (𝐹 “ {(𝐹𝑥)})) ≠ ∅)
51 imadisj 5447 . . . . . . . . . . . . 13 ((𝐺 “ (𝐹 “ {(𝐹𝑥)})) = ∅ ↔ (dom 𝐺 ∩ (𝐹 “ {(𝐹𝑥)})) = ∅)
5251necon3bii 2848 . . . . . . . . . . . 12 ((𝐺 “ (𝐹 “ {(𝐹𝑥)})) ≠ ∅ ↔ (dom 𝐺 ∩ (𝐹 “ {(𝐹𝑥)})) ≠ ∅)
5350, 52sylibr 224 . . . . . . . . . . 11 ((𝜑𝑥𝑋) → (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ≠ ∅)
54 eqsn 4334 . . . . . . . . . . 11 ((𝐺 “ (𝐹 “ {(𝐹𝑥)})) ≠ ∅ → ((𝐺 “ (𝐹 “ {(𝐹𝑥)})) = {(𝐺𝑥)} ↔ ∀𝑤 ∈ (𝐺 “ (𝐹 “ {(𝐹𝑥)}))𝑤 = (𝐺𝑥)))
5553, 54syl 17 . . . . . . . . . 10 ((𝜑𝑥𝑋) → ((𝐺 “ (𝐹 “ {(𝐹𝑥)})) = {(𝐺𝑥)} ↔ ∀𝑤 ∈ (𝐺 “ (𝐹 “ {(𝐹𝑥)}))𝑤 = (𝐺𝑥)))
5639, 55mpbird 247 . . . . . . . . 9 ((𝜑𝑥𝑋) → (𝐺 “ (𝐹 “ {(𝐹𝑥)})) = {(𝐺𝑥)})
5756unieqd 4417 . . . . . . . 8 ((𝜑𝑥𝑋) → (𝐺 “ (𝐹 “ {(𝐹𝑥)})) = {(𝐺𝑥)})
58 fvex 6160 . . . . . . . . 9 (𝐺𝑥) ∈ V
5958unisn 4422 . . . . . . . 8 {(𝐺𝑥)} = (𝐺𝑥)
6057, 59syl6req 2677 . . . . . . 7 ((𝜑𝑥𝑋) → (𝐺𝑥) = (𝐺 “ (𝐹 “ {(𝐹𝑥)})))
6160mpteq2dva 4709 . . . . . 6 (𝜑 → (𝑥𝑋 ↦ (𝐺𝑥)) = (𝑥𝑋 (𝐺 “ (𝐹 “ {(𝐹𝑥)}))))
6225feqmptd 6207 . . . . . 6 (𝜑𝐺 = (𝑥𝑋 ↦ (𝐺𝑥)))
6331ffvelrnda 6316 . . . . . . 7 ((𝜑𝑥𝑋) → (𝐹𝑥) ∈ 𝑌)
6431feqmptd 6207 . . . . . . 7 (𝜑𝐹 = (𝑥𝑋 ↦ (𝐹𝑥)))
65 eqidd 2627 . . . . . . 7 (𝜑 → (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) = (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))))
66 sneq 4163 . . . . . . . . . 10 (𝑤 = (𝐹𝑥) → {𝑤} = {(𝐹𝑥)})
6766imaeq2d 5429 . . . . . . . . 9 (𝑤 = (𝐹𝑥) → (𝐹 “ {𝑤}) = (𝐹 “ {(𝐹𝑥)}))
6867imaeq2d 5429 . . . . . . . 8 (𝑤 = (𝐹𝑥) → (𝐺 “ (𝐹 “ {𝑤})) = (𝐺 “ (𝐹 “ {(𝐹𝑥)})))
6968unieqd 4417 . . . . . . 7 (𝑤 = (𝐹𝑥) → (𝐺 “ (𝐹 “ {𝑤})) = (𝐺 “ (𝐹 “ {(𝐹𝑥)})))
7063, 64, 65, 69fmptco 6352 . . . . . 6 (𝜑 → ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹) = (𝑥𝑋 (𝐺 “ (𝐹 “ {(𝐹𝑥)}))))
7161, 62, 703eqtr4d 2670 . . . . 5 (𝜑𝐺 = ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹))
7271, 18eqeltrrd 2705 . . . 4 (𝜑 → ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹) ∈ (𝐽 Cn 𝐾))
7325ffvelrnda 6316 . . . . . . . . 9 ((𝜑𝑥𝑋) → (𝐺𝑥) ∈ 𝐾)
7460, 73eqeltrrd 2705 . . . . . . . 8 ((𝜑𝑥𝑋) → (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ∈ 𝐾)
7574ralrimiva 2965 . . . . . . 7 (𝜑 → ∀𝑥𝑋 (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ∈ 𝐾)
7669eqcomd 2632 . . . . . . . . . . 11 (𝑤 = (𝐹𝑥) → (𝐺 “ (𝐹 “ {(𝐹𝑥)})) = (𝐺 “ (𝐹 “ {𝑤})))
7776eqcoms 2634 . . . . . . . . . 10 ((𝐹𝑥) = 𝑤 (𝐺 “ (𝐹 “ {(𝐹𝑥)})) = (𝐺 “ (𝐹 “ {𝑤})))
7877eleq1d 2688 . . . . . . . . 9 ((𝐹𝑥) = 𝑤 → ( (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ∈ 𝐾 (𝐺 “ (𝐹 “ {𝑤})) ∈ 𝐾))
7978cbvfo 6499 . . . . . . . 8 (𝐹:𝑋onto𝑌 → (∀𝑥𝑋 (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ∈ 𝐾 ↔ ∀𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤})) ∈ 𝐾))
801, 79syl 17 . . . . . . 7 (𝜑 → (∀𝑥𝑋 (𝐺 “ (𝐹 “ {(𝐹𝑥)})) ∈ 𝐾 ↔ ∀𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤})) ∈ 𝐾))
8175, 80mpbid 222 . . . . . 6 (𝜑 → ∀𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤})) ∈ 𝐾)
82 eqid 2626 . . . . . . 7 (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) = (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤})))
8382fmpt 6338 . . . . . 6 (∀𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤})) ∈ 𝐾 ↔ (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))):𝑌 𝐾)
8481, 83sylib 208 . . . . 5 (𝜑 → (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))):𝑌 𝐾)
85 qtopcn 21422 . . . . 5 (((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘ 𝐾)) ∧ (𝐹:𝑋onto𝑌 ∧ (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))):𝑌 𝐾)) → ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ↔ ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹) ∈ (𝐽 Cn 𝐾)))
8617, 23, 1, 84, 85syl22anc 1324 . . . 4 (𝜑 → ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ↔ ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹) ∈ (𝐽 Cn 𝐾)))
8772, 86mpbird 247 . . 3 (𝜑 → (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∈ ((𝐽 qTop 𝐹) Cn 𝐾))
88 coeq1 5244 . . . . 5 (𝑓 = (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) → (𝑓𝐹) = ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹))
8988eqeq2d 2636 . . . 4 (𝑓 = (𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) → (𝐺 = (𝑓𝐹) ↔ 𝐺 = ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹)))
9089rspcev 3300 . . 3 (((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝐺 = ((𝑤𝑌 (𝐺 “ (𝐹 “ {𝑤}))) ∘ 𝐹)) → ∃𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹))
9187, 71, 90syl2anc 692 . 2 (𝜑 → ∃𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹))
92 eqtr2 2646 . . . 4 ((𝐺 = (𝑓𝐹) ∧ 𝐺 = (𝑔𝐹)) → (𝑓𝐹) = (𝑔𝐹))
931adantr 481 . . . . 5 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝐹:𝑋onto𝑌)
94 qtoptopon 21412 . . . . . . . . 9 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐹:𝑋onto𝑌) → (𝐽 qTop 𝐹) ∈ (TopOn‘𝑌))
9517, 1, 94syl2anc 692 . . . . . . . 8 (𝜑 → (𝐽 qTop 𝐹) ∈ (TopOn‘𝑌))
9695adantr 481 . . . . . . 7 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → (𝐽 qTop 𝐹) ∈ (TopOn‘𝑌))
9723adantr 481 . . . . . . 7 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝐾 ∈ (TopOn‘ 𝐾))
98 simprl 793 . . . . . . 7 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))
99 cnf2 20958 . . . . . . 7 (((𝐽 qTop 𝐹) ∈ (TopOn‘𝑌) ∧ 𝐾 ∈ (TopOn‘ 𝐾) ∧ 𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)) → 𝑓:𝑌 𝐾)
10096, 97, 98, 99syl3anc 1323 . . . . . 6 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑓:𝑌 𝐾)
101 ffn 6004 . . . . . 6 (𝑓:𝑌 𝐾𝑓 Fn 𝑌)
102100, 101syl 17 . . . . 5 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑓 Fn 𝑌)
103 simprr 795 . . . . . . 7 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))
104 cnf2 20958 . . . . . . 7 (((𝐽 qTop 𝐹) ∈ (TopOn‘𝑌) ∧ 𝐾 ∈ (TopOn‘ 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)) → 𝑔:𝑌 𝐾)
10596, 97, 103, 104syl3anc 1323 . . . . . 6 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑔:𝑌 𝐾)
106 ffn 6004 . . . . . 6 (𝑔:𝑌 𝐾𝑔 Fn 𝑌)
107105, 106syl 17 . . . . 5 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → 𝑔 Fn 𝑌)
108 cocan2 6502 . . . . 5 ((𝐹:𝑋onto𝑌𝑓 Fn 𝑌𝑔 Fn 𝑌) → ((𝑓𝐹) = (𝑔𝐹) ↔ 𝑓 = 𝑔))
10993, 102, 107, 108syl3anc 1323 . . . 4 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → ((𝑓𝐹) = (𝑔𝐹) ↔ 𝑓 = 𝑔))
11092, 109syl5ib 234 . . 3 ((𝜑 ∧ (𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾) ∧ 𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾))) → ((𝐺 = (𝑓𝐹) ∧ 𝐺 = (𝑔𝐹)) → 𝑓 = 𝑔))
111110ralrimivva 2970 . 2 (𝜑 → ∀𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)∀𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)((𝐺 = (𝑓𝐹) ∧ 𝐺 = (𝑔𝐹)) → 𝑓 = 𝑔))
112 coeq1 5244 . . . 4 (𝑓 = 𝑔 → (𝑓𝐹) = (𝑔𝐹))
113112eqeq2d 2636 . . 3 (𝑓 = 𝑔 → (𝐺 = (𝑓𝐹) ↔ 𝐺 = (𝑔𝐹)))
114113reu4 3387 . 2 (∃!𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹) ↔ (∃𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹) ∧ ∀𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)∀𝑔 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)((𝐺 = (𝑓𝐹) ∧ 𝐺 = (𝑔𝐹)) → 𝑓 = 𝑔)))
11591, 111, 114sylanbrc 697 1 (𝜑 → ∃!𝑓 ∈ ((𝐽 qTop 𝐹) Cn 𝐾)𝐺 = (𝑓𝐹))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  w3a 1036   = wceq 1480  wcel 1992  wne 2796  wral 2912  wrex 2913  ∃!wreu 2914  cin 3559  wss 3560  c0 3896  {csn 4153   cuni 4407  cmpt 4678  ccnv 5078  dom cdm 5079  cima 5082  ccom 5083   Fn wfn 5845  wf 5846  ontowfo 5848  cfv 5850  (class class class)co 6605   qTop cqtop 16079  Topctop 20612  TopOnctopon 20613   Cn ccn 20933
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
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  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-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-op 4160  df-uni 4408  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-id 4994  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-iota 5813  df-fun 5852  df-fn 5853  df-f 5854  df-f1 5855  df-fo 5856  df-f1o 5857  df-fv 5858  df-ov 6608  df-oprab 6609  df-mpt2 6610  df-map 7805  df-qtop 16083  df-top 20616  df-topon 20618  df-cn 20936
This theorem is referenced by:  qtophmeo  21525
  Copyright terms: Public domain W3C validator