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Theorem qtopf1 22400
 Description: If a quotient map is injective, then it is a homeomorphism. (Contributed by Mario Carneiro, 25-Aug-2015.)
Hypotheses
Ref Expression
qtopf1.1 (𝜑𝐽 ∈ (TopOn‘𝑋))
qtopf1.2 (𝜑𝐹:𝑋1-1𝑌)
Assertion
Ref Expression
qtopf1 (𝜑𝐹 ∈ (𝐽Homeo(𝐽 qTop 𝐹)))

Proof of Theorem qtopf1
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 qtopf1.1 . . 3 (𝜑𝐽 ∈ (TopOn‘𝑋))
2 qtopf1.2 . . . 4 (𝜑𝐹:𝑋1-1𝑌)
3 f1fn 6549 . . . 4 (𝐹:𝑋1-1𝑌𝐹 Fn 𝑋)
42, 3syl 17 . . 3 (𝜑𝐹 Fn 𝑋)
5 qtopid 22289 . . 3 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐹 Fn 𝑋) → 𝐹 ∈ (𝐽 Cn (𝐽 qTop 𝐹)))
61, 4, 5syl2anc 587 . 2 (𝜑𝐹 ∈ (𝐽 Cn (𝐽 qTop 𝐹)))
7 f1f1orn 6599 . . . 4 (𝐹:𝑋1-1𝑌𝐹:𝑋1-1-onto→ran 𝐹)
8 f1ocnv 6600 . . . 4 (𝐹:𝑋1-1-onto→ran 𝐹𝐹:ran 𝐹1-1-onto𝑋)
9 f1of 6588 . . . 4 (𝐹:ran 𝐹1-1-onto𝑋𝐹:ran 𝐹𝑋)
102, 7, 8, 94syl 19 . . 3 (𝜑𝐹:ran 𝐹𝑋)
11 imacnvcnv 6036 . . . . 5 (𝐹𝑥) = (𝐹𝑥)
12 imassrn 5913 . . . . . . 7 (𝐹𝑥) ⊆ ran 𝐹
1312a1i 11 . . . . . 6 ((𝜑𝑥𝐽) → (𝐹𝑥) ⊆ ran 𝐹)
142adantr 484 . . . . . . . 8 ((𝜑𝑥𝐽) → 𝐹:𝑋1-1𝑌)
15 toponss 21511 . . . . . . . . 9 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑥𝐽) → 𝑥𝑋)
161, 15sylan 583 . . . . . . . 8 ((𝜑𝑥𝐽) → 𝑥𝑋)
17 f1imacnv 6604 . . . . . . . 8 ((𝐹:𝑋1-1𝑌𝑥𝑋) → (𝐹 “ (𝐹𝑥)) = 𝑥)
1814, 16, 17syl2anc 587 . . . . . . 7 ((𝜑𝑥𝐽) → (𝐹 “ (𝐹𝑥)) = 𝑥)
19 simpr 488 . . . . . . 7 ((𝜑𝑥𝐽) → 𝑥𝐽)
2018, 19eqeltrd 2912 . . . . . 6 ((𝜑𝑥𝐽) → (𝐹 “ (𝐹𝑥)) ∈ 𝐽)
21 dffn4 6569 . . . . . . . . 9 (𝐹 Fn 𝑋𝐹:𝑋onto→ran 𝐹)
224, 21sylib 221 . . . . . . . 8 (𝜑𝐹:𝑋onto→ran 𝐹)
23 elqtop3 22287 . . . . . . . 8 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐹:𝑋onto→ran 𝐹) → ((𝐹𝑥) ∈ (𝐽 qTop 𝐹) ↔ ((𝐹𝑥) ⊆ ran 𝐹 ∧ (𝐹 “ (𝐹𝑥)) ∈ 𝐽)))
241, 22, 23syl2anc 587 . . . . . . 7 (𝜑 → ((𝐹𝑥) ∈ (𝐽 qTop 𝐹) ↔ ((𝐹𝑥) ⊆ ran 𝐹 ∧ (𝐹 “ (𝐹𝑥)) ∈ 𝐽)))
2524adantr 484 . . . . . 6 ((𝜑𝑥𝐽) → ((𝐹𝑥) ∈ (𝐽 qTop 𝐹) ↔ ((𝐹𝑥) ⊆ ran 𝐹 ∧ (𝐹 “ (𝐹𝑥)) ∈ 𝐽)))
2613, 20, 25mpbir2and 712 . . . . 5 ((𝜑𝑥𝐽) → (𝐹𝑥) ∈ (𝐽 qTop 𝐹))
2711, 26eqeltrid 2916 . . . 4 ((𝜑𝑥𝐽) → (𝐹𝑥) ∈ (𝐽 qTop 𝐹))
2827ralrimiva 3170 . . 3 (𝜑 → ∀𝑥𝐽 (𝐹𝑥) ∈ (𝐽 qTop 𝐹))
29 qtoptopon 22288 . . . . 5 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐹:𝑋onto→ran 𝐹) → (𝐽 qTop 𝐹) ∈ (TopOn‘ran 𝐹))
301, 22, 29syl2anc 587 . . . 4 (𝜑 → (𝐽 qTop 𝐹) ∈ (TopOn‘ran 𝐹))
31 iscn 21819 . . . 4 (((𝐽 qTop 𝐹) ∈ (TopOn‘ran 𝐹) ∧ 𝐽 ∈ (TopOn‘𝑋)) → (𝐹 ∈ ((𝐽 qTop 𝐹) Cn 𝐽) ↔ (𝐹:ran 𝐹𝑋 ∧ ∀𝑥𝐽 (𝐹𝑥) ∈ (𝐽 qTop 𝐹))))
3230, 1, 31syl2anc 587 . . 3 (𝜑 → (𝐹 ∈ ((𝐽 qTop 𝐹) Cn 𝐽) ↔ (𝐹:ran 𝐹𝑋 ∧ ∀𝑥𝐽 (𝐹𝑥) ∈ (𝐽 qTop 𝐹))))
3310, 28, 32mpbir2and 712 . 2 (𝜑𝐹 ∈ ((𝐽 qTop 𝐹) Cn 𝐽))
34 ishmeo 22343 . 2 (𝐹 ∈ (𝐽Homeo(𝐽 qTop 𝐹)) ↔ (𝐹 ∈ (𝐽 Cn (𝐽 qTop 𝐹)) ∧ 𝐹 ∈ ((𝐽 qTop 𝐹) Cn 𝐽)))
356, 33, 34sylanbrc 586 1 (𝜑𝐹 ∈ (𝐽Homeo(𝐽 qTop 𝐹)))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1538   ∈ wcel 2115  ∀wral 3126   ⊆ wss 3910  ◡ccnv 5527  ran crn 5529   “ cima 5531   Fn wfn 6323  ⟶wf 6324  –1-1→wf1 6325  –onto→wfo 6326  –1-1-onto→wf1o 6327  ‘cfv 6328  (class class class)co 7130   qTop cqtop 16755  TopOnctopon 21494   Cn ccn 21808  Homeochmeo 22337 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 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2178  ax-ext 2793  ax-rep 5163  ax-sep 5176  ax-nul 5183  ax-pow 5239  ax-pr 5303  ax-un 7436 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2071  df-mo 2623  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2892  df-nfc 2960  df-ne 3008  df-ral 3131  df-rex 3132  df-reu 3133  df-rab 3135  df-v 3473  df-sbc 3750  df-csb 3858  df-dif 3913  df-un 3915  df-in 3917  df-ss 3927  df-nul 4267  df-if 4441  df-pw 4514  df-sn 4541  df-pr 4543  df-op 4547  df-uni 4812  df-iun 4894  df-br 5040  df-opab 5102  df-mpt 5120  df-id 5433  df-xp 5534  df-rel 5535  df-cnv 5536  df-co 5537  df-dm 5538  df-rn 5539  df-res 5540  df-ima 5541  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 7133  df-oprab 7134  df-mpo 7135  df-map 8383  df-qtop 16759  df-top 21478  df-topon 21495  df-cn 21811  df-hmeo 22339 This theorem is referenced by:  t0kq  22402
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