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Theorem topfneec2 37359
Description: A topology is precisely identified with its equivalence class. (Contributed by Jeff Hankins, 12-Oct-2009.)
Hypothesis
Ref Expression
topfneec2.1 ∼ = (Fne ∩ ◡Fne)
Assertion
Ref Expression
topfneec2 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ([𝐽] ∼ = [𝐾] ∼ ↔ 𝐽 = 𝐾))

Proof of Theorem topfneec2
StepHypRef Expression
1 topfneec2.1 . . 3 ∼ = (Fne ∩ ◡Fne)
21fneval 37355 . 2 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → (𝐽 ∼ 𝐾 ↔ (topGen‘𝐽) = (topGen‘𝐾)))
31fneer 37356 . . . 4 ∼ Er V
43a1i 11 . . 3 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ∼ Er V)
5 elex 3475 . . . 4 (𝐽 ∈ Top → 𝐽 ∈ V)
65adantr 486 . . 3 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → 𝐽 ∈ V)
74, 6erth 8810 . 2 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → (𝐽 ∼ 𝐾 ↔ [𝐽] ∼ = [𝐾] ∼ ))
8 tgtop 23346 . . 3 (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽)
9 tgtop 23346 . . 3 (𝐾 ∈ Top → (topGen‘𝐾) = 𝐾)
108, 9eqeqan12d 2777 . 2 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ((topGen‘𝐽) = (topGen‘𝐾) ↔ 𝐽 = 𝐾))
112, 7, 103bitr3d 312 1 ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ([𝐽] ∼ = [𝐾] ∼ ↔ 𝐽 = 𝐾))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   = wceq 1570   ∈ wcel 2147  Vcvv 3454   ∩ cin 4092   class class class wbr 5108  ◡ccnv 5657  ‘cfv 6566   Er wer 8752  [cec 8753  topGenctg 17658  Topctop 23266  Fnecfne 37339
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5255  ax-nul 5266  ax-pow 5334  ax-pr 5398  ax-un 7783
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-iun 4958  df-br 5109  df-opab 5174  df-mpt 5193  df-id 5553  df-xp 5664  df-rel 5665  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-res 5670  df-ima 5671  df-iota 6520  df-fun 6568  df-fv 6574  df-er 8755  df-ec 8757  df-topgen 17664  df-top 23267  df-fne 37340
This theorem is used by: (None)
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