topfneec2 - Mathbox for Jeff Hankins

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Theorem topfneec2 36584

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**
Step	Hyp	Ref	Expression
1		topfneec2.1	. . 3 ⊢ ∼ = (Fne ∩ ^◡Fne)
2	1	fneval 36580	. 2 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → (𝐽 ∼ 𝐾 ↔ (topGen‘𝐽) = (topGen‘𝐾)))
3	1	fneer 36581	. . . 4 ⊢ ∼ Er V
4	3	a1i 11	. . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ∼ Er V)
5		elex 3452	. . . 4 ⊢ (𝐽 ∈ Top → 𝐽 ∈ V)
6	5	adantr 481	. . 3 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → 𝐽 ∈ V)
7	4, 6	erth 8688	. 2 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → (𝐽 ∼ 𝐾 ↔ [𝐽] ∼ = [𝐾] ∼ ))
8		tgtop 22956	. . 3 ⊢ (𝐽 ∈ Top → (topGen‘𝐽) = 𝐽)
9		tgtop 22956	. . 3 ⊢ (𝐾 ∈ Top → (topGen‘𝐾) = 𝐾)
10	8, 9	eqeqan12d 2753	. 2 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ((topGen‘𝐽) = (topGen‘𝐾) ↔ 𝐽 = 𝐾))
11	2, 7, 10	3bitr3d 310	1 ⊢ ((𝐽 ∈ Top ∧ 𝐾 ∈ Top) → ([𝐽] ∼ = [𝐾] ∼ ↔ 𝐽 = 𝐾))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1547 ∈ wcel 2119 Vcvv 3431 ∩ cin 3882 class class class wbr 5072 ^◡ccnv 5617 ‘cfv 6485 Er wer 8630 [cec 8631 topGenctg 17391 Topctop 22876 Fnecfne 36564

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678

This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fv 6493 df-er 8633 df-ec 8635 df-topgen 17397 df-top 22877 df-fne 36565

This theorem is referenced by: (None)

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