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Theorem cncfcncntop 15109

Description: Relate complex function continuity to topological continuity. (Contributed by Mario Carneiro, 17-Feb-2015.)

**Hypotheses**
Ref	Expression
cncfcn.2	⊢ 𝐽 = (MetOpen‘(abs ∘ − ))
cncfcn.3	⊢ 𝐾 = (𝐽 ↾_t 𝐴)
cncfcn.4	⊢ 𝐿 = (𝐽 ↾_t 𝐵)

**Assertion**
Ref	Expression
cncfcncntop	⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐾 Cn 𝐿))

**Proof of Theorem cncfcncntop**
Step	Hyp	Ref	Expression
1		eqid 2206	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐴 × 𝐴)) = ((abs ∘ − ) ↾ (𝐴 × 𝐴))
2		eqid 2206	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐵 × 𝐵)) = ((abs ∘ − ) ↾ (𝐵 × 𝐵))
3		eqid 2206	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴)))
4		eqid 2206	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))
5	1, 2, 3, 4	cncfmet 15108	. 2 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = ((MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) Cn (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))))
6		cncfcn.3	. . . 4 ⊢ 𝐾 = (𝐽 ↾_t 𝐴)
7		cnxmet 15047	. . . . 5 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
8		simpl 109	. . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐴 ⊆ ℂ)
9		cncfcn.2	. . . . . 6 ⊢ 𝐽 = (MetOpen‘(abs ∘ − ))
10	1, 9, 3	metrest 15022	. . . . 5 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ⊆ ℂ) → (𝐽 ↾_t 𝐴) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
11	7, 8, 10	sylancr 414	. . . 4 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐴) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
12	6, 11	eqtrid 2251	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐾 = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
13		cncfcn.4	. . . 4 ⊢ 𝐿 = (𝐽 ↾_t 𝐵)
14		simpr 110	. . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐵 ⊆ ℂ)
15	2, 9, 4	metrest 15022	. . . . 5 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐵) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
16	7, 14, 15	sylancr 414	. . . 4 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐵) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
17	13, 16	eqtrid 2251	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐿 = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
18	12, 17	oveq12d 5969	. 2 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐾 Cn 𝐿) = ((MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) Cn (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))))
19	5, 18	eqtr4d 2242	1 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐾 Cn 𝐿))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2177 ⊆ wss 3167 × cxp 4677 ↾ cres 4681 ∘ ccom 4683 ‘cfv 5276 (class class class)co 5951 ℂcc 7930 − cmin 8250 abscabs 11352 ↾_t crest 13115 ∞Metcxmet 14342 MetOpencmopn 14347 Cn ccn 14701 –cn→ccncf 15086

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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4163 ax-sep 4166 ax-nul 4174 ax-pow 4222 ax-pr 4257 ax-un 4484 ax-setind 4589 ax-iinf 4640 ax-cnex 8023 ax-resscn 8024 ax-1cn 8025 ax-1re 8026 ax-icn 8027 ax-addcl 8028 ax-addrcl 8029 ax-mulcl 8030 ax-mulrcl 8031 ax-addcom 8032 ax-mulcom 8033 ax-addass 8034 ax-mulass 8035 ax-distr 8036 ax-i2m1 8037 ax-0lt1 8038 ax-1rid 8039 ax-0id 8040 ax-rnegex 8041 ax-precex 8042 ax-cnre 8043 ax-pre-ltirr 8044 ax-pre-ltwlin 8045 ax-pre-lttrn 8046 ax-pre-apti 8047 ax-pre-ltadd 8048 ax-pre-mulgt0 8049 ax-pre-mulext 8050 ax-arch 8051 ax-caucvg 8052

This theorem depends on definitions: df-bi 117 df-stab 833 df-dc 837 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3000 df-csb 3095 df-dif 3169 df-un 3171 df-in 3173 df-ss 3180 df-nul 3462 df-if 3573 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-int 3888 df-iun 3931 df-br 4048 df-opab 4110 df-mpt 4111 df-tr 4147 df-id 4344 df-po 4347 df-iso 4348 df-iord 4417 df-on 4419 df-ilim 4420 df-suc 4422 df-iom 4643 df-xp 4685 df-rel 4686 df-cnv 4687 df-co 4688 df-dm 4689 df-rn 4690 df-res 4691 df-ima 4692 df-iota 5237 df-fun 5278 df-fn 5279 df-f 5280 df-f1 5281 df-fo 5282 df-f1o 5283 df-fv 5284 df-isom 5285 df-riota 5906 df-ov 5954 df-oprab 5955 df-mpo 5956 df-1st 6233 df-2nd 6234 df-recs 6398 df-frec 6484 df-map 6744 df-sup 7093 df-inf 7094 df-pnf 8116 df-mnf 8117 df-xr 8118 df-ltxr 8119 df-le 8120 df-sub 8252 df-neg 8253 df-reap 8655 df-ap 8662 df-div 8753 df-inn 9044 df-2 9102 df-3 9103 df-4 9104 df-n0 9303 df-z 9380 df-uz 9656 df-q 9748 df-rp 9783 df-xneg 9901 df-xadd 9902 df-seqfrec 10600 df-exp 10691 df-cj 11197 df-re 11198 df-im 11199 df-rsqrt 11353 df-abs 11354 df-rest 13117 df-topgen 13136 df-psmet 14349 df-xmet 14350 df-met 14351 df-bl 14352 df-mopn 14353 df-top 14514 df-topon 14527 df-bases 14559 df-cn 14704 df-cnp 14705 df-cncf 15087

This theorem is referenced by: cncfcn1cntop 15110 cncfmpt2fcntop 15115 cnrehmeocntop 15126 cnlimcim 15187 cnlimc 15188 dvcn 15216

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