Theorem cnrest 12185

Description: Continuity of a restriction from a subspace. (Contributed by Jeff Hankins, 11-Jul-2009.) (Revised by Mario Carneiro, 21-Aug-2015.)

Hypothesis

Ref	Expression
cnrest.1	⊢ 𝑋 = ∪ 𝐽

Assertion

Ref	Expression
cnrest	⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))

Proof of Theorem cnrest

Dummy variable 𝑜 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnrest.1	. . . . 5 ⊢ 𝑋 = ∪ 𝐽
2		eqid 2100	. . . . 5 ⊢ ∪ 𝐾 = ∪ 𝐾
3	1, 2	cnf 12154	. . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾)
4	3	adantr 272	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐹:𝑋⟶∪ 𝐾)
5		simpr 109	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ⊆ 𝑋)
6	4, 5	fssresd 5235	. 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾)
7		cnvresima 4964	. . . 4 ⊢ (◡(𝐹 ↾ 𝐴) “ 𝑜) = ((◡𝐹 “ 𝑜) ∩ 𝐴)
8		cntop1 12151	. . . . . . 7 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top)
9	8	adantr 272	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐽 ∈ Top)
10	9	adantr 272	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐽 ∈ Top)
11	1	topopn 11957	. . . . . . . 8 ⊢ (𝐽 ∈ Top → 𝑋 ∈ 𝐽)
12		ssexg 4007	. . . . . . . . 9 ⊢ ((𝐴 ⊆ 𝑋 ∧ 𝑋 ∈ 𝐽) → 𝐴 ∈ V)
13	12	ancoms 266	. . . . . . . 8 ⊢ ((𝑋 ∈ 𝐽 ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
14	11, 13	sylan 279	. . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
15	8, 14	sylan 279	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
16	15	adantr 272	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐴 ∈ V)
17		cnima 12170	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽)
18	17	adantlr 464	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽)
19		elrestr 11910	. . . . 5 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ V ∧ (◡𝐹 “ 𝑜) ∈ 𝐽) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
20	10, 16, 18, 19	syl3anc 1184	. . . 4 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
21	7, 20	syl5eqel 2186	. . 3 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))
22	21	ralrimiva 2464	. 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))
23	1	toptopon 11967	. . . . 5 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋))
24	8, 23	sylib 121	. . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ (TopOn‘𝑋))
25		resttopon 12122	. . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴))
26	24, 25	sylan 279	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴))
27		cntop2 12152	. . . . 5 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
28	27	adantr 272	. . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ Top)
29	2	toptopon 11967	. . . 4 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
30	28, 29	sylib 121	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ (TopOn‘∪ 𝐾))
31		iscn 12147	. . 3 ⊢ (((𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴) ∧ 𝐾 ∈ (TopOn‘∪ 𝐾)) → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ ((𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾 ∧ ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))))
32	26, 30, 31	syl2anc 406	. 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ ((𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾 ∧ ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))))
33	6, 22, 32	mpbir2and 896	1 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1299   ∈ wcel 1448  ∀wral 2375  Vcvv 2641   ∩ cin 3020   ⊆ wss 3021  ∪ cuni 3683  ^◡ccnv 4476   ↾ cres 4479   “ cima 4480  ⟶wf 5055  ‘cfv 5059  (class class class)co 5706   ↾_t crest 11902  Topctop 11946  TopOnctopon 11959   Cn ccn 12136

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 584  ax-in2 585  ax-io 671  ax-5 1391  ax-7 1392  ax-gen 1393  ax-ie1 1437  ax-ie2 1438  ax-8 1450  ax-10 1451  ax-11 1452  ax-i12 1453  ax-bndl 1454  ax-4 1455  ax-13 1459  ax-14 1460  ax-17 1474  ax-i9 1478  ax-ial 1482  ax-i5r 1483  ax-ext 2082  ax-coll 3983  ax-sep 3986  ax-pow 4038  ax-pr 4069  ax-un 4293  ax-setind 4390

This theorem depends on definitions:  df-bi 116  df-3an 932  df-tru 1302  df-fal 1305  df-nf 1405  df-sb 1704  df-eu 1963  df-mo 1964  df-clab 2087  df-cleq 2093  df-clel 2096  df-nfc 2229  df-ne 2268  df-ral 2380  df-rex 2381  df-reu 2382  df-rab 2384  df-v 2643  df-sbc 2863  df-csb 2956  df-dif 3023  df-un 3025  df-in 3027  df-ss 3034  df-pw 3459  df-sn 3480  df-pr 3481  df-op 3483  df-uni 3684  df-iun 3762  df-br 3876  df-opab 3930  df-mpt 3931  df-id 4153  df-xp 4483  df-rel 4484  df-cnv 4485  df-co 4486  df-dm 4487  df-rn 4488  df-res 4489  df-ima 4490  df-iota 5024  df-fun 5061  df-fn 5062  df-f 5063  df-f1 5064  df-fo 5065  df-f1o 5066  df-fv 5067  df-ov 5709  df-oprab 5710  df-mpo 5711  df-1st 5969  df-2nd 5970  df-map 6474  df-rest 11904  df-topgen 11923  df-top 11947  df-topon 11960  df-bases 11992  df-cn 12139

This theorem is referenced by:  cnmpt1res  12246  cnmpt2res  12247