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Theorem nrmhmph 23823

Description: Normality is a topological property. (Contributed by Mario Carneiro, 25-Aug-2015.)

**Assertion**
Ref	Expression
nrmhmph	⊢ (𝐽 ≃ 𝐾 → (𝐽 ∈ Nrm → 𝐾 ∈ Nrm))

Proof of Theorem nrmhmph Dummy variables 𝑤 𝑓 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		hmph 23805	. 2 ⊢ (𝐽 ≃ 𝐾 ↔ (𝐽Homeo𝐾) ≠ ∅)
2		n0 4376	. . 3 ⊢ ((𝐽Homeo𝐾) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝐽Homeo𝐾))
3		hmeocn 23789	. . . . . . . 8 ⊢ (𝑓 ∈ (𝐽Homeo𝐾) → 𝑓 ∈ (𝐽 Cn 𝐾))
4	3	adantl 481	. . . . . . 7 ⊢ ((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) → 𝑓 ∈ (𝐽 Cn 𝐾))
5		cntop2 23270	. . . . . . 7 ⊢ (𝑓 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
6	4, 5	syl 17	. . . . . 6 ⊢ ((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) → 𝐾 ∈ Top)
7		simpll 766	. . . . . . . . 9 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝐽 ∈ Nrm)
8	4	adantr 480	. . . . . . . . . 10 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑓 ∈ (𝐽 Cn 𝐾))
9		simprl 770	. . . . . . . . . 10 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑥 ∈ 𝐾)
10		cnima 23294	. . . . . . . . . 10 ⊢ ((𝑓 ∈ (𝐽 Cn 𝐾) ∧ 𝑥 ∈ 𝐾) → (^◡𝑓 “ 𝑥) ∈ 𝐽)
11	8, 9, 10	syl2anc 583	. . . . . . . . 9 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → (^◡𝑓 “ 𝑥) ∈ 𝐽)
12		simprr 772	. . . . . . . . . . 11 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))
13	12	elin1d 4227	. . . . . . . . . 10 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑦 ∈ (Clsd‘𝐾))
14		cnclima 23297	. . . . . . . . . 10 ⊢ ((𝑓 ∈ (𝐽 Cn 𝐾) ∧ 𝑦 ∈ (Clsd‘𝐾)) → (^◡𝑓 “ 𝑦) ∈ (Clsd‘𝐽))
15	8, 13, 14	syl2anc 583	. . . . . . . . 9 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → (^◡𝑓 “ 𝑦) ∈ (Clsd‘𝐽))
16	12	elin2d 4228	. . . . . . . . . . 11 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑦 ∈ 𝒫 𝑥)
17	16	elpwid 4631	. . . . . . . . . 10 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → 𝑦 ⊆ 𝑥)
18		imass2 6132	. . . . . . . . . 10 ⊢ (𝑦 ⊆ 𝑥 → (^◡𝑓 “ 𝑦) ⊆ (^◡𝑓 “ 𝑥))
19	17, 18	syl 17	. . . . . . . . 9 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → (^◡𝑓 “ 𝑦) ⊆ (^◡𝑓 “ 𝑥))
20		nrmsep3 23384	. . . . . . . . 9 ⊢ ((𝐽 ∈ Nrm ∧ ((^◡𝑓 “ 𝑥) ∈ 𝐽 ∧ (^◡𝑓 “ 𝑦) ∈ (Clsd‘𝐽) ∧ (^◡𝑓 “ 𝑦) ⊆ (^◡𝑓 “ 𝑥))) → ∃𝑤 ∈ 𝐽 ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))
21	7, 11, 15, 19, 20	syl13anc 1372	. . . . . . . 8 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → ∃𝑤 ∈ 𝐽 ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))
22		simpllr 775	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑓 ∈ (𝐽Homeo𝐾))
23		simprl 770	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑤 ∈ 𝐽)
24		hmeoima 23794	. . . . . . . . . 10 ⊢ ((𝑓 ∈ (𝐽Homeo𝐾) ∧ 𝑤 ∈ 𝐽) → (𝑓 “ 𝑤) ∈ 𝐾)
25	22, 23, 24	syl2anc 583	. . . . . . . . 9 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → (𝑓 “ 𝑤) ∈ 𝐾)
26		simprrl 780	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → (^◡𝑓 “ 𝑦) ⊆ 𝑤)
27		eqid 2740	. . . . . . . . . . . . . 14 ⊢ ∪ 𝐽 = ∪ 𝐽
28		eqid 2740	. . . . . . . . . . . . . 14 ⊢ ∪ 𝐾 = ∪ 𝐾
29	27, 28	hmeof1o 23793	. . . . . . . . . . . . 13 ⊢ (𝑓 ∈ (𝐽Homeo𝐾) → 𝑓:∪ 𝐽–1-1-onto→∪ 𝐾)
30	22, 29	syl 17	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑓:∪ 𝐽–1-1-onto→∪ 𝐾)
31		f1ofun 6864	. . . . . . . . . . . 12 ⊢ (𝑓:∪ 𝐽–1-1-onto→∪ 𝐾 → Fun 𝑓)
32	30, 31	syl 17	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → Fun 𝑓)
33	13	adantr 480	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑦 ∈ (Clsd‘𝐾))
34	28	cldss 23058	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ (Clsd‘𝐾) → 𝑦 ⊆ ∪ 𝐾)
35	33, 34	syl 17	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑦 ⊆ ∪ 𝐾)
36		f1ofo 6869	. . . . . . . . . . . . 13 ⊢ (𝑓:∪ 𝐽–1-1-onto→∪ 𝐾 → 𝑓:∪ 𝐽–onto→∪ 𝐾)
37		forn 6837	. . . . . . . . . . . . 13 ⊢ (𝑓:∪ 𝐽–onto→∪ 𝐾 → ran 𝑓 = ∪ 𝐾)
38	30, 36, 37	3syl 18	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ran 𝑓 = ∪ 𝐾)
39	35, 38	sseqtrrd 4050	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑦 ⊆ ran 𝑓)
40		funimass1 6660	. . . . . . . . . . 11 ⊢ ((Fun 𝑓 ∧ 𝑦 ⊆ ran 𝑓) → ((^◡𝑓 “ 𝑦) ⊆ 𝑤 → 𝑦 ⊆ (𝑓 “ 𝑤)))
41	32, 39, 40	syl2anc 583	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((^◡𝑓 “ 𝑦) ⊆ 𝑤 → 𝑦 ⊆ (𝑓 “ 𝑤)))
42	26, 41	mpd 15	. . . . . . . . 9 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑦 ⊆ (𝑓 “ 𝑤))
43		elssuni 4961	. . . . . . . . . . . 12 ⊢ (𝑤 ∈ 𝐽 → 𝑤 ⊆ ∪ 𝐽)
44	43	ad2antrl 727	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝑤 ⊆ ∪ 𝐽)
45	27	hmeocls 23797	. . . . . . . . . . 11 ⊢ ((𝑓 ∈ (𝐽Homeo𝐾) ∧ 𝑤 ⊆ ∪ 𝐽) → ((cls‘𝐾)‘(𝑓 “ 𝑤)) = (𝑓 “ ((cls‘𝐽)‘𝑤)))
46	22, 44, 45	syl2anc 583	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((cls‘𝐾)‘(𝑓 “ 𝑤)) = (𝑓 “ ((cls‘𝐽)‘𝑤)))
47		simprrr 781	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥))
48		nrmtop 23365	. . . . . . . . . . . . . . 15 ⊢ (𝐽 ∈ Nrm → 𝐽 ∈ Top)
49	48	ad3antrrr 729	. . . . . . . . . . . . . 14 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → 𝐽 ∈ Top)
50	27	clsss3 23088	. . . . . . . . . . . . . 14 ⊢ ((𝐽 ∈ Top ∧ 𝑤 ⊆ ∪ 𝐽) → ((cls‘𝐽)‘𝑤) ⊆ ∪ 𝐽)
51	49, 44, 50	syl2anc 583	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((cls‘𝐽)‘𝑤) ⊆ ∪ 𝐽)
52		f1odm 6866	. . . . . . . . . . . . . 14 ⊢ (𝑓:∪ 𝐽–1-1-onto→∪ 𝐾 → dom 𝑓 = ∪ 𝐽)
53	30, 52	syl 17	. . . . . . . . . . . . 13 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → dom 𝑓 = ∪ 𝐽)
54	51, 53	sseqtrrd 4050	. . . . . . . . . . . 12 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((cls‘𝐽)‘𝑤) ⊆ dom 𝑓)
55		funimass3 7087	. . . . . . . . . . . 12 ⊢ ((Fun 𝑓 ∧ ((cls‘𝐽)‘𝑤) ⊆ dom 𝑓) → ((𝑓 “ ((cls‘𝐽)‘𝑤)) ⊆ 𝑥 ↔ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))
56	32, 54, 55	syl2anc 583	. . . . . . . . . . 11 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((𝑓 “ ((cls‘𝐽)‘𝑤)) ⊆ 𝑥 ↔ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))
57	47, 56	mpbird 257	. . . . . . . . . 10 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → (𝑓 “ ((cls‘𝐽)‘𝑤)) ⊆ 𝑥)
58	46, 57	eqsstrd 4047	. . . . . . . . 9 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ((cls‘𝐾)‘(𝑓 “ 𝑤)) ⊆ 𝑥)
59		sseq2 4035	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑓 “ 𝑤) → (𝑦 ⊆ 𝑧 ↔ 𝑦 ⊆ (𝑓 “ 𝑤)))
60		fveq2 6920	. . . . . . . . . . . 12 ⊢ (𝑧 = (𝑓 “ 𝑤) → ((cls‘𝐾)‘𝑧) = ((cls‘𝐾)‘(𝑓 “ 𝑤)))
61	60	sseq1d 4040	. . . . . . . . . . 11 ⊢ (𝑧 = (𝑓 “ 𝑤) → (((cls‘𝐾)‘𝑧) ⊆ 𝑥 ↔ ((cls‘𝐾)‘(𝑓 “ 𝑤)) ⊆ 𝑥))
62	59, 61	anbi12d 631	. . . . . . . . . 10 ⊢ (𝑧 = (𝑓 “ 𝑤) → ((𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥) ↔ (𝑦 ⊆ (𝑓 “ 𝑤) ∧ ((cls‘𝐾)‘(𝑓 “ 𝑤)) ⊆ 𝑥)))
63	62	rspcev 3635	. . . . . . . . 9 ⊢ (((𝑓 “ 𝑤) ∈ 𝐾 ∧ (𝑦 ⊆ (𝑓 “ 𝑤) ∧ ((cls‘𝐾)‘(𝑓 “ 𝑤)) ⊆ 𝑥)) → ∃𝑧 ∈ 𝐾 (𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥))
64	25, 42, 58, 63	syl12anc 836	. . . . . . . 8 ⊢ ((((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) ∧ (𝑤 ∈ 𝐽 ∧ ((^◡𝑓 “ 𝑦) ⊆ 𝑤 ∧ ((cls‘𝐽)‘𝑤) ⊆ (^◡𝑓 “ 𝑥)))) → ∃𝑧 ∈ 𝐾 (𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥))
65	21, 64	rexlimddv 3167	. . . . . . 7 ⊢ (((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥))) → ∃𝑧 ∈ 𝐾 (𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥))
66	65	ralrimivva 3208	. . . . . 6 ⊢ ((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) → ∀𝑥 ∈ 𝐾 ∀𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥)∃𝑧 ∈ 𝐾 (𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥))
67		isnrm 23364	. . . . . 6 ⊢ (𝐾 ∈ Nrm ↔ (𝐾 ∈ Top ∧ ∀𝑥 ∈ 𝐾 ∀𝑦 ∈ ((Clsd‘𝐾) ∩ 𝒫 𝑥)∃𝑧 ∈ 𝐾 (𝑦 ⊆ 𝑧 ∧ ((cls‘𝐾)‘𝑧) ⊆ 𝑥)))
68	6, 66, 67	sylanbrc 582	. . . . 5 ⊢ ((𝐽 ∈ Nrm ∧ 𝑓 ∈ (𝐽Homeo𝐾)) → 𝐾 ∈ Nrm)
69	68	expcom 413	. . . 4 ⊢ (𝑓 ∈ (𝐽Homeo𝐾) → (𝐽 ∈ Nrm → 𝐾 ∈ Nrm))
70	69	exlimiv 1929	. . 3 ⊢ (∃𝑓 𝑓 ∈ (𝐽Homeo𝐾) → (𝐽 ∈ Nrm → 𝐾 ∈ Nrm))
71	2, 70	sylbi 217	. 2 ⊢ ((𝐽Homeo𝐾) ≠ ∅ → (𝐽 ∈ Nrm → 𝐾 ∈ Nrm))
72	1, 71	sylbi 217	1 ⊢ (𝐽 ≃ 𝐾 → (𝐽 ∈ Nrm → 𝐾 ∈ Nrm))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1537 ∃wex 1777 ∈ wcel 2108 ≠ wne 2946 ∀wral 3067 ∃wrex 3076 ∩ cin 3975 ⊆ wss 3976 ∅c0 4352 𝒫 cpw 4622 ∪ cuni 4931 class class class wbr 5166 ^◡ccnv 5699 dom cdm 5700 ran crn 5701 “ cima 5703 Fun wfun 6567 –onto→wfo 6571 –1-1-onto→wf1o 6572 ‘cfv 6573 (class class class)co 7448 Topctop 22920 Clsdccld 23045 clsccl 23047 Cn ccn 23253 Nrmcnrm 23339 Homeochmeo 23782 ≃ chmph 23783

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-ral 3068 df-rex 3077 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-int 4971 df-iun 5017 df-iin 5018 df-br 5167 df-opab 5229 df-mpt 5250 df-id 5593 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-ov 7451 df-oprab 7452 df-mpo 7453 df-1st 8030 df-2nd 8031 df-1o 8522 df-map 8886 df-top 22921 df-topon 22938 df-cld 23048 df-cls 23050 df-cn 23256 df-nrm 23346 df-hmeo 23784 df-hmph 23785

This theorem is referenced by: (None)

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