Theorem cvmcov2 33237

Description: The covering map property can be restricted to an open subset. (Contributed by Mario Carneiro, 7-Jul-2015.)

Hypothesis

Ref	Expression
cvmcov.1	⊢ 𝑆 = (𝑘 ∈ 𝐽 ↦ {𝑠 ∈ (𝒫 𝐶 ∖ {∅}) ∣ (∪ 𝑠 = (◡𝐹 “ 𝑘) ∧ ∀𝑢 ∈ 𝑠 (∀𝑣 ∈ (𝑠 ∖ {𝑢})(𝑢 ∩ 𝑣) = ∅ ∧ (𝐹 ↾ 𝑢) ∈ ((𝐶 ↾t 𝑢)Homeo(𝐽 ↾t 𝑘))))})

Assertion

Ref	Expression
cvmcov2	⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → ∃𝑥 ∈ 𝒫 𝑈(𝑃 ∈ 𝑥 ∧ (𝑆‘𝑥) ≠ ∅))

Distinct variable groups:   𝑘,𝑠,𝑢,𝑣,𝑥,𝐶   𝑘,𝐹,𝑠,𝑢,𝑣,𝑥   𝑃,𝑘,𝑥   𝑘,𝐽,𝑠,𝑢,𝑣,𝑥   𝑥,𝑆   𝑈,𝑘,𝑠,𝑢,𝑣,𝑥

Allowed substitution hints:   𝑃(𝑣,𝑢,𝑠)   𝑆(𝑣,𝑢,𝑘,𝑠)

Proof of Theorem cvmcov2

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simp1 1135	. . 3 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → 𝐹 ∈ (𝐶 CovMap 𝐽))
2		simp3 1137	. . . 4 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → 𝑃 ∈ 𝑈)
3		simp2 1136	. . . 4 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → 𝑈 ∈ 𝐽)
4		elunii 4844	. . . 4 ⊢ ((𝑃 ∈ 𝑈 ∧ 𝑈 ∈ 𝐽) → 𝑃 ∈ ∪ 𝐽)
5	2, 3, 4	syl2anc 584	. . 3 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → 𝑃 ∈ ∪ 𝐽)
6		cvmcov.1	. . . 4 ⊢ 𝑆 = (𝑘 ∈ 𝐽 ↦ {𝑠 ∈ (𝒫 𝐶 ∖ {∅}) ∣ (∪ 𝑠 = (◡𝐹 “ 𝑘) ∧ ∀𝑢 ∈ 𝑠 (∀𝑣 ∈ (𝑠 ∖ {𝑢})(𝑢 ∩ 𝑣) = ∅ ∧ (𝐹 ↾ 𝑢) ∈ ((𝐶 ↾t 𝑢)Homeo(𝐽 ↾t 𝑘))))})
7		eqid 2738	. . . 4 ⊢ ∪ 𝐽 = ∪ 𝐽
8	6, 7	cvmcov 33225	. . 3 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑃 ∈ ∪ 𝐽) → ∃𝑦 ∈ 𝐽 (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))
9	1, 5, 8	syl2anc 584	. 2 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → ∃𝑦 ∈ 𝐽 (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))
10		inss2 4163	. . . . 5 ⊢ (𝑦 ∩ 𝑈) ⊆ 𝑈
11		vex 3436	. . . . . . 7 ⊢ 𝑦 ∈ V
12	11	inex1 5241	. . . . . 6 ⊢ (𝑦 ∩ 𝑈) ∈ V
13	12	elpw 4537	. . . . 5 ⊢ ((𝑦 ∩ 𝑈) ∈ 𝒫 𝑈 ↔ (𝑦 ∩ 𝑈) ⊆ 𝑈)
14	10, 13	mpbir 230	. . . 4 ⊢ (𝑦 ∩ 𝑈) ∈ 𝒫 𝑈
15	14	a1i 11	. . 3 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → (𝑦 ∩ 𝑈) ∈ 𝒫 𝑈)
16		simprrl 778	. . . 4 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝑃 ∈ 𝑦)
17	2	adantr 481	. . . 4 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝑃 ∈ 𝑈)
18	16, 17	elind 4128	. . 3 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝑃 ∈ (𝑦 ∩ 𝑈))
19		simprrr 779	. . . 4 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → (𝑆‘𝑦) ≠ ∅)
20	1	adantr 481	. . . . 5 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝐹 ∈ (𝐶 CovMap 𝐽))
21		cvmtop2 33223	. . . . . . 7 ⊢ (𝐹 ∈ (𝐶 CovMap 𝐽) → 𝐽 ∈ Top)
22	20, 21	syl 17	. . . . . 6 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝐽 ∈ Top)
23		simprl 768	. . . . . 6 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝑦 ∈ 𝐽)
24	3	adantr 481	. . . . . 6 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → 𝑈 ∈ 𝐽)
25		inopn 22048	. . . . . 6 ⊢ ((𝐽 ∈ Top ∧ 𝑦 ∈ 𝐽 ∧ 𝑈 ∈ 𝐽) → (𝑦 ∩ 𝑈) ∈ 𝐽)
26	22, 23, 24, 25	syl3anc 1370	. . . . 5 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → (𝑦 ∩ 𝑈) ∈ 𝐽)
27		inss1 4162	. . . . . 6 ⊢ (𝑦 ∩ 𝑈) ⊆ 𝑦
28	27	a1i 11	. . . . 5 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → (𝑦 ∩ 𝑈) ⊆ 𝑦)
29	6	cvmsss2 33236	. . . . 5 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ (𝑦 ∩ 𝑈) ∈ 𝐽 ∧ (𝑦 ∩ 𝑈) ⊆ 𝑦) → ((𝑆‘𝑦) ≠ ∅ → (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅))
30	20, 26, 28, 29	syl3anc 1370	. . . 4 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → ((𝑆‘𝑦) ≠ ∅ → (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅))
31	19, 30	mpd 15	. . 3 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅)
32		eleq2 2827	. . . . 5 ⊢ (𝑥 = (𝑦 ∩ 𝑈) → (𝑃 ∈ 𝑥 ↔ 𝑃 ∈ (𝑦 ∩ 𝑈)))
33		fveq2 6774	. . . . . 6 ⊢ (𝑥 = (𝑦 ∩ 𝑈) → (𝑆‘𝑥) = (𝑆‘(𝑦 ∩ 𝑈)))
34	33	neeq1d 3003	. . . . 5 ⊢ (𝑥 = (𝑦 ∩ 𝑈) → ((𝑆‘𝑥) ≠ ∅ ↔ (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅))
35	32, 34	anbi12d 631	. . . 4 ⊢ (𝑥 = (𝑦 ∩ 𝑈) → ((𝑃 ∈ 𝑥 ∧ (𝑆‘𝑥) ≠ ∅) ↔ (𝑃 ∈ (𝑦 ∩ 𝑈) ∧ (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅)))
36	35	rspcev 3561	. . 3 ⊢ (((𝑦 ∩ 𝑈) ∈ 𝒫 𝑈 ∧ (𝑃 ∈ (𝑦 ∩ 𝑈) ∧ (𝑆‘(𝑦 ∩ 𝑈)) ≠ ∅)) → ∃𝑥 ∈ 𝒫 𝑈(𝑃 ∈ 𝑥 ∧ (𝑆‘𝑥) ≠ ∅))
37	15, 18, 31, 36	syl12anc 834	. 2 ⊢ (((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) ∧ (𝑦 ∈ 𝐽 ∧ (𝑃 ∈ 𝑦 ∧ (𝑆‘𝑦) ≠ ∅))) → ∃𝑥 ∈ 𝒫 𝑈(𝑃 ∈ 𝑥 ∧ (𝑆‘𝑥) ≠ ∅))
38	9, 37	rexlimddv 3220	1 ⊢ ((𝐹 ∈ (𝐶 CovMap 𝐽) ∧ 𝑈 ∈ 𝐽 ∧ 𝑃 ∈ 𝑈) → ∃𝑥 ∈ 𝒫 𝑈(𝑃 ∈ 𝑥 ∧ (𝑆‘𝑥) ≠ ∅))

Syntax hints:   → wi 4   ∧ wa 396   ∧ w3a 1086   = wceq 1539   ∈ wcel 2106   ≠ wne 2943  ∀wral 3064  ∃wrex 3065  {crab 3068   ∖ cdif 3884   ∩ cin 3886   ⊆ wss 3887  ∅c0 4256  𝒫 cpw 4533  {csn 4561  ∪ cuni 4839   ↦ cmpt 5157  ^◡ccnv 5588   ↾ cres 5591   “ cima 5592  ‘cfv 6433  (class class class)co 7275   ↾_t crest 17131  Topctop 22042  Homeochmeo 22904   CovMap ccvm 33217

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-map 8617  df-en 8734  df-fin 8737  df-fi 9170  df-rest 17133  df-topgen 17154  df-top 22043  df-topon 22060  df-bases 22096  df-cn 22378  df-hmeo 22906  df-cvm 33218

This theorem is referenced by: (None)