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Theorem qtoptop 23624
Description: The quotient topology is a topology. (Contributed by Mario Carneiro, 23-Mar-2015.)
Hypothesis
Ref Expression
qtoptop.1 𝑋 = 𝐽
Assertion
Ref Expression
qtoptop ((𝐽 ∈ Top ∧ 𝐹 Fn 𝑋) → (𝐽 qTop 𝐹) ∈ Top)

Proof of Theorem qtoptop
StepHypRef Expression
1 simpl 481 . 2 ((𝐽 ∈ Top ∧ 𝐹 Fn 𝑋) → 𝐽 ∈ Top)
2 id 22 . . 3 (𝐹 Fn 𝑋𝐹 Fn 𝑋)
3 qtoptop.1 . . . 4 𝑋 = 𝐽
43topopn 22828 . . 3 (𝐽 ∈ Top → 𝑋𝐽)
5 fnex 7235 . . 3 ((𝐹 Fn 𝑋𝑋𝐽) → 𝐹 ∈ V)
62, 4, 5syl2anr 595 . 2 ((𝐽 ∈ Top ∧ 𝐹 Fn 𝑋) → 𝐹 ∈ V)
7 fnfun 6659 . . 3 (𝐹 Fn 𝑋 → Fun 𝐹)
87adantl 480 . 2 ((𝐽 ∈ Top ∧ 𝐹 Fn 𝑋) → Fun 𝐹)
9 qtoptop2 23623 . 2 ((𝐽 ∈ Top ∧ 𝐹 ∈ V ∧ Fun 𝐹) → (𝐽 qTop 𝐹) ∈ Top)
101, 6, 8, 9syl3anc 1368 1 ((𝐽 ∈ Top ∧ 𝐹 Fn 𝑋) → (𝐽 qTop 𝐹) ∈ Top)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 394   = wceq 1533  wcel 2098  Vcvv 3473   cuni 4912  Fun wfun 6547   Fn wfn 6548  (class class class)co 7426   qTop cqtop 17492  Topctop 22815
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2166  ax-ext 2699  ax-rep 5289  ax-sep 5303  ax-nul 5310  ax-pow 5369  ax-pr 5433  ax-un 7746
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2529  df-eu 2558  df-clab 2706  df-cleq 2720  df-clel 2806  df-nfc 2881  df-ne 2938  df-ral 3059  df-rex 3068  df-reu 3375  df-rab 3431  df-v 3475  df-sbc 3779  df-csb 3895  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-nul 4327  df-if 4533  df-pw 4608  df-sn 4633  df-pr 4635  df-op 4639  df-uni 4913  df-iun 5002  df-br 5153  df-opab 5215  df-mpt 5236  df-id 5580  df-xp 5688  df-rel 5689  df-cnv 5690  df-co 5691  df-dm 5692  df-rn 5693  df-res 5694  df-ima 5695  df-iota 6505  df-fun 6555  df-fn 6556  df-f 6557  df-f1 6558  df-fo 6559  df-f1o 6560  df-fv 6561  df-ov 7429  df-oprab 7430  df-mpo 7431  df-qtop 17496  df-top 22816
This theorem is referenced by:  qtoptopon  23628  qtopkgen  23634  qtopt1  33469  qtophaus  33470
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