Theorem connima 23381

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 2737	. . . . . . 7 ⊢ ∪ 𝐾 = ∪ 𝐾
5	3, 4	cnf 23202	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋⟶∪ 𝐾)
6	2, 5	syl 17	. . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶∪ 𝐾)
7	6	ffund 6674	. . . 4 ⊢ (𝜑 → Fun 𝐹)
8		connima.a	. . . . 5 ⊢ (𝜑 → 𝐴 ⊆ 𝑋)
9	6	fdmd 6680	. . . . 5 ⊢ (𝜑 → dom 𝐹 = 𝑋)
10	8, 9	sseqtrrd 3973	. . . 4 ⊢ (𝜑 → 𝐴 ⊆ dom 𝐹)
11		fores 6764	. . . 4 ⊢ ((Fun 𝐹 ∧ 𝐴 ⊆ dom 𝐹) → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
12	7, 10, 11	syl2anc 585	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴–onto→(𝐹 “ 𝐴))
13		cntop2 23197	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
14	2, 13	syl 17	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ Top)
15		imassrn 6038	. . . . . 6 ⊢ (𝐹 “ 𝐴) ⊆ ran 𝐹
16	6	frnd 6678	. . . . . 6 ⊢ (𝜑 → ran 𝐹 ⊆ ∪ 𝐾)
17	15, 16	sstrid 3947	. . . . 5 ⊢ (𝜑 → (𝐹 “ 𝐴) ⊆ ∪ 𝐾)
18	4	restuni 23118	. . . . 5 ⊢ ((𝐾 ∈ Top ∧ (𝐹 “ 𝐴) ⊆ ∪ 𝐾) → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
19	14, 17, 18	syl2anc 585	. . . 4 ⊢ (𝜑 → (𝐹 “ 𝐴) = ∪ (𝐾 ↾t (𝐹 “ 𝐴)))
20		foeq3 6752	. . . 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 23241	. . . 4 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴 ⊆ 𝑋) → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
24	2, 8, 23	syl2anc 585	. . 3 ⊢ (𝜑 → (𝐹 ↾ 𝐴) ∈ ((𝐽 ↾t 𝐴) Cn 𝐾))
25		toptopon2 22874	. . . . 5 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
26	14, 25	sylib 218	. . . 4 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘∪ 𝐾))
27		df-ima 5645	. . . . 5 ⊢ (𝐹 “ 𝐴) = ran (𝐹 ↾ 𝐴)
28		eqimss2 3995	. . . . 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 23242	. . . 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 1374	. . 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 2737	. . 3 ⊢ ∪ (𝐾 ↾t (𝐹 “ 𝐴)) = ∪ (𝐾 ↾t (𝐹 “ 𝐴))
34	33	cnconn 23378	. 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 1374	1 ⊢ (𝜑 → (𝐾 ↾t (𝐹 “ 𝐴)) ∈ Conn)

Syntax hints:   → wi 4   ↔ wb 206   = wceq 1542   ∈ wcel 2114   ⊆ wss 3903  ∪ cuni 4865  dom cdm 5632  ran crn 5633   ↾ cres 5634   “ cima 5635  Fun wfun 6494  ⟶wf 6496  –onto→wfo 6498  ‘cfv 6500  (class class class)co 7368   ↾_t crest 17352  Topctop 22849  TopOnctopon 22866   Cn ccn 23180  Conncconn 23367

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5226  ax-sep 5243  ax-nul 5253  ax-pow 5312  ax-pr 5379  ax-un 7690

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-int 4905  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5527  df-eprel 5532  df-po 5540  df-so 5541  df-fr 5585  df-we 5587  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-res 5644  df-ima 5645  df-ord 6328  df-on 6329  df-lim 6330  df-suc 6331  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-f1 6505  df-fo 6506  df-f1o 6507  df-fv 6508  df-ov 7371  df-oprab 7372  df-mpo 7373  df-om 7819  df-1st 7943  df-2nd 7944  df-map 8777  df-en 8896  df-fin 8899  df-fi 9326  df-rest 17354  df-topgen 17375  df-top 22850  df-topon 22867  df-bases 22902  df-cld 22975  df-cn 23183  df-conn 23368

This theorem is referenced by:  tgpconncompeqg  24068  tgpconncomp  24069