Theorem connima 22027

Description: The image of a connected set is connected. (Contributed by Mario Carneiro, 7-Jul-2015.) (Revised by Mario Carneiro, 22-Aug-2015.)

Hypotheses

Ref	Expression
connima.x	⊢ 𝑋 = ∪ 𝐽
connima.f	⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾))
connima.a	⊢ (𝜑 → 𝐴 ⊆ 𝑋)
connima.c	⊢ (𝜑 → (𝐽 ↾t 𝐴) ∈ Conn)

Assertion

Ref	Expression
connima	⊢ (𝜑 → (𝐾 ↾t (𝐹 “ 𝐴)) ∈ Conn)

Proof of Theorem connima

Step	Hyp	Ref	Expression
1		connima.c	. 2 ⊢ (𝜑 → (𝐽 ↾t 𝐴) ∈ Conn)
2		connima.f	. . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾))
3		connima.x	. . . . . . 7 ⊢ 𝑋 = ∪ 𝐽
4		eqid 2821	. . . . . . 7 ⊢ ∪ 𝐾 = ∪ 𝐾
5	3, 4	cnf 21848	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾)
6	2, 5	syl 17	. . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶∪ 𝐾)
7	6	ffund 6512	. . . 4 ⊢ (𝜑 → Fun 𝐹)
8		connima.a	. . . . 5 ⊢ (𝜑 → 𝐴 ⊆ 𝑋)
9	6	fdmd 6517	. . . . 5 ⊢ (𝜑 → dom 𝐹 = 𝑋)
10	8, 9	sseqtrrd 4007	. . . 4 ⊢ (𝜑 → 𝐴 ⊆ dom 𝐹)
11		fores 6594	. . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
12	7, 10, 11	syl2anc 586	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
13		cntop2 21843	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
14	2, 13	syl 17	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ Top)
15		imassrn 5934	. . . . . 6 ⊢ (𝐹 “ 𝐴) ⊆ ran 𝐹
16	6	frnd 6515	. . . . . 6 ⊢ (𝜑 → ran 𝐹 ⊆ ∪ 𝐾)
17	15, 16	sstrid 3977	. . . . 5 ⊢ (𝜑 → (𝐹 “ 𝐴) ⊆ ∪ 𝐾)
18	4	restuni 21764	. . . . 5 ⊢ ((𝐾 ∈ Top ∧ (𝐹 “ 𝐴) ⊆ ∪ 𝐾) → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
19	14, 17, 18	syl2anc 586	. . . 4 ⊢ (𝜑 → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
20		foeq3 6582	. . . 4 ⊢ ((𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)) → ((𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴) ↔ (𝐹 ↾ 𝐴):𝐴–onto→∪ (𝐾 ↾t (𝐹 “ 𝐴))))
21	19, 20	syl 17	. . 3 ⊢ (𝜑 → ((𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴) ↔ (𝐹 ↾ 𝐴):𝐴–onto→∪ (𝐾 ↾t (𝐹 “ 𝐴))))
22	12, 21	mpbid 234	. 2 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴–onto→∪ (𝐾 ↾t (𝐹 “ 𝐴)))
23	3	cnrest 21887	. . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
24	2, 8, 23	syl2anc 586	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
25		toptopon2 21520	. . . . 5 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
26	14, 25	sylib 220	. . . 4 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘∪ 𝐾))
27		df-ima 5562	. . . . 5 ⊢ (𝐹 “ 𝐴) = ran (𝐹 ↾ 𝐴)
28		eqimss2 4023	. . . . 5 ⊢ ((𝐹 “ 𝐴) = ran (𝐹 ↾ 𝐴) → ran (𝐹 ↾ 𝐴) ⊆ (𝐹 “ 𝐴))
29	27, 28	mp1i 13	. . . 4 ⊢ (𝜑 → ran (𝐹 ↾ 𝐴) ⊆ (𝐹 “ 𝐴))
30		cnrest2 21888	. . . 4 ⊢ ((𝐾 ∈ (TopOn‘∪ 𝐾) ∧ ran (𝐹 ↾ 𝐴) ⊆ (𝐹 “ 𝐴) ∧ (𝐹 “ 𝐴) ⊆ ∪ 𝐾) → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴)))))
31	26, 29, 17, 30	syl3anc 1367	. . 3 ⊢ (𝜑 → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴)))))
32	24, 31	mpbid 234	. 2 ⊢ (𝜑 → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴))))
33		eqid 2821	. . 3 ⊢ ∪ (𝐾 ↾t (𝐹 “ 𝐴)) = ∪ (𝐾 ↾t (𝐹 “ 𝐴))
34	33	cnconn 22024	. 2 ⊢ (((𝐽 ↾t 𝐴) ∈ Conn ∧ (𝐹 ↾ 𝐴):𝐴–onto→∪ (𝐾 ↾t (𝐹 “ 𝐴)) ∧ (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴)))) → (𝐾 ↾t (𝐹 “ 𝐴)) ∈ Conn)
35	1, 22, 32, 34	syl3anc 1367	1 ⊢ (𝜑 → (𝐾 ↾t (𝐹 “ 𝐴)) ∈ Conn)

Syntax hints:   → wi 4   ↔ wb 208   = wceq 1533   ∈ wcel 2110   ⊆ wss 3935  ∪ cuni 4831  dom cdm 5549  ran crn 5550   ↾ cres 5551   “ cima 5552  Fun wfun 6343  ⟶wf 6345  –onto→wfo 6347  ‘cfv 6349  (class class class)co 7150   ↾_t crest 16688  Topctop 21495  TopOnctopon 21512   Cn ccn 21826  Conncconn 22013

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-rep 5182  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-pss 3953  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4561  df-pr 4563  df-tp 4565  df-op 4567  df-uni 4832  df-int 4869  df-iun 4913  df-br 5059  df-opab 5121  df-mpt 5139  df-tr 5165  df-id 5454  df-eprel 5459  df-po 5468  df-so 5469  df-fr 5508  df-we 5510  df-xp 5555  df-rel 5556  df-cnv 5557  df-co 5558  df-dm 5559  df-rn 5560  df-res 5561  df-ima 5562  df-pred 6142  df-ord 6188  df-on 6189  df-lim 6190  df-suc 6191  df-iota 6308  df-fun 6351  df-fn 6352  df-f 6353  df-f1 6354  df-fo 6355  df-f1o 6356  df-fv 6357  df-ov 7153  df-oprab 7154  df-mpo 7155  df-om 7575  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-oadd 8100  df-er 8283  df-map 8402  df-en 8504  df-fin 8507  df-fi 8869  df-rest 16690  df-topgen 16711  df-top 21496  df-topon 21513  df-bases 21548  df-cld 21621  df-cn 21829  df-conn 22014

This theorem is referenced by:  tgpconncompeqg  22714  tgpconncomp  22715