Theorem connima 23363

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 2735	. . . . . . 7 ⊢ ∪ 𝐾 = ∪ 𝐾
5	3, 4	cnf 23184	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾)
6	2, 5	syl 17	. . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶∪ 𝐾)
7	6	ffund 6710	. . . 4 ⊢ (𝜑 → Fun 𝐹)
8		connima.a	. . . . 5 ⊢ (𝜑 → 𝐴 ⊆ 𝑋)
9	6	fdmd 6716	. . . . 5 ⊢ (𝜑 → dom 𝐹 = 𝑋)
10	8, 9	sseqtrrd 3996	. . . 4 ⊢ (𝜑 → 𝐴 ⊆ dom 𝐹)
11		fores 6800	. . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
12	7, 10, 11	syl2anc 584	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
13		cntop2 23179	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
14	2, 13	syl 17	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ Top)
15		imassrn 6058	. . . . . 6 ⊢ (𝐹 “ 𝐴) ⊆ ran 𝐹
16	6	frnd 6714	. . . . . 6 ⊢ (𝜑 → ran 𝐹 ⊆ ∪ 𝐾)
17	15, 16	sstrid 3970	. . . . 5 ⊢ (𝜑 → (𝐹 “ 𝐴) ⊆ ∪ 𝐾)
18	4	restuni 23100	. . . . 5 ⊢ ((𝐾 ∈ Top ∧ (𝐹 “ 𝐴) ⊆ ∪ 𝐾) → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
19	14, 17, 18	syl2anc 584	. . . 4 ⊢ (𝜑 → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
20		foeq3 6788	. . . 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 232	. 2 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴–onto→∪ (𝐾 ↾t (𝐹 “ 𝐴)))
23	3	cnrest 23223	. . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
24	2, 8, 23	syl2anc 584	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
25		toptopon2 22856	. . . . 5 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
26	14, 25	sylib 218	. . . 4 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘∪ 𝐾))
27		df-ima 5667	. . . . 5 ⊢ (𝐹 “ 𝐴) = ran (𝐹 ↾ 𝐴)
28		eqimss2 4018	. . . . 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 23224	. . . 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 1373	. . 3 ⊢ (𝜑 → ((𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾) ↔ (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴)))))
32	24, 31	mpbid 232	. 2 ⊢ (𝜑 → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn (𝐾 ↾t (𝐹 “ 𝐴))))
33		eqid 2735	. . 3 ⊢ ∪ (𝐾 ↾t (𝐹 “ 𝐴)) = ∪ (𝐾 ↾t (𝐹 “ 𝐴))
34	33	cnconn 23360	. 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 1373	1 ⊢ (𝜑 → (𝐾 ↾t (𝐹 “ 𝐴)) ∈ Conn)

Syntax hints:   → wi 4   ↔ wb 206   = wceq 1540   ∈ wcel 2108   ⊆ wss 3926  ∪ cuni 4883  dom cdm 5654  ran crn 5655   ↾ cres 5656   “ cima 5657  Fun wfun 6525  ⟶wf 6527  –onto→wfo 6529  ‘cfv 6531  (class class class)co 7405   ↾_t crest 17434  Topctop 22831  TopOnctopon 22848   Cn ccn 23162  Conncconn 23349

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-rep 5249  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-int 4923  df-iun 4969  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-map 8842  df-en 8960  df-fin 8963  df-fi 9423  df-rest 17436  df-topgen 17457  df-top 22832  df-topon 22849  df-bases 22884  df-cld 22957  df-cn 23165  df-conn 23350

This theorem is referenced by:  tgpconncompeqg  24050  tgpconncomp  24051