Theorem cnrest 15259

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 2238	. . . . 5 ⊢ ∪ 𝐾 = ∪ 𝐾
3	1, 2	cnf 15228	. . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾)
4	3	adantr 276	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐹:𝑋⟶∪ 𝐾)
5		simpr 110	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ⊆ 𝑋)
6	4, 5	fssresd 5561	. 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴):𝐴⟶∪ 𝐾)
7		cnvresima 5272	. . . 4 ⊢ (◡(𝐹 ↾ 𝐴) “ 𝑜) = ((◡𝐹 “ 𝑜) ∩ 𝐴)
8		cntop1 15225	. . . . . . 7 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top)
9	8	adantr 276	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐽 ∈ Top)
10	9	adantr 276	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐽 ∈ Top)
11	1	topopn 15032	. . . . . . . 8 ⊢ (𝐽 ∈ Top → 𝑋 ∈ 𝐽)
12		ssexg 4267	. . . . . . . . 9 ⊢ ((𝐴 ⊆ 𝑋 ∧ 𝑋 ∈ 𝐽) → 𝐴 ∈ V)
13	12	ancoms 268	. . . . . . . 8 ⊢ ((𝑋 ∈ 𝐽 ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
14	11, 13	sylan 283	. . . . . . 7 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
15	8, 14	sylan 283	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐴 ∈ V)
16	15	adantr 276	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → 𝐴 ∈ V)
17		cnima 15244	. . . . . 6 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽)
18	17	adantlr 481	. . . . 5 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡𝐹 “ 𝑜) ∈ 𝐽)
19		elrestr 13578	. . . . 5 ⊢ ((𝐽 ∈ Top ∧ 𝐴 ∈ V ∧ (◡𝐹 “ 𝑜) ∈ 𝐽) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
20	10, 16, 18, 19	syl3anc 1278	. . . 4 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → ((◡𝐹 “ 𝑜) ∩ 𝐴) ∈ (𝐽 ↾t 𝐴))
21	7, 20	eqeltrid 2325	. . 3 ⊢ (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) ∧ 𝑜 ∈ 𝐾) → (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))
22	21	ralrimiva 2623	. 2 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → ∀𝑜 ∈ 𝐾 (◡(𝐹 ↾ 𝐴) “ 𝑜) ∈ (𝐽 ↾t 𝐴))
23	1	toptopon 15042	. . . . 5 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋))
24	8, 23	sylib 122	. . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ (TopOn‘𝑋))
25		resttopon 15195	. . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴))
26	24, 25	sylan 283	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐽 ↾t 𝐴) ∈ (TopOn‘𝐴))
27		cntop2 15226	. . . . 5 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
28	27	adantr 276	. . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ Top)
29	2	toptopon 15042	. . . 4 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
30	28, 29	sylib 122	. . 3 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → 𝐾 ∈ (TopOn‘∪ 𝐾))
31		iscn 15221	. . 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 415	. 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 957	1 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1402   ∈ wcel 2209  ∀wral 2528  Vcvv 2821   ∩ cin 3219   ⊆ wss 3220  ∪ cuni 3930  ^◡ccnv 4768   ↾ cres 4771   “ cima 4772  ⟶wf 5368  ‘cfv 5372  (class class class)co 6075   ↾_t crest 13570  Topctop 15021  TopOnctopon 15034   Cn ccn 15209

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-map 6914  df-rest 13572  df-topgen 13591  df-top 15022  df-topon 15035  df-bases 15067  df-cn 15212

This theorem is referenced by:  cnmpt1res  15320  cnmpt2res  15321  hmeores  15339