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Theorem cncfcncntop 12752

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 2139	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐴 × 𝐴)) = ((abs ∘ − ) ↾ (𝐴 × 𝐴))
2		eqid 2139	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐵 × 𝐵)) = ((abs ∘ − ) ↾ (𝐵 × 𝐵))
3		eqid 2139	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴)))
4		eqid 2139	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))
5	1, 2, 3, 4	cncfmet 12751	. 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 12703	. . . . 5 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ)
8		simpl 108	. . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐴 ⊆ ℂ)
9		cncfcn.2	. . . . . 6 ⊢ 𝐽 = (MetOpen‘(abs ∘ − ))
10	1, 9, 3	metrest 12678	. . . . 5 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐴 ⊆ ℂ) → (𝐽 ↾_t 𝐴) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
11	7, 8, 10	sylancr 410	. . . 4 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐴) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
12	6, 11	syl5eq 2184	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐾 = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))))
13		cncfcn.4	. . . 4 ⊢ 𝐿 = (𝐽 ↾_t 𝐵)
14		simpr 109	. . . . 5 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐵 ⊆ ℂ)
15	2, 9, 4	metrest 12678	. . . . 5 ⊢ (((abs ∘ − ) ∈ (∞Met‘ℂ) ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐵) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
16	7, 14, 15	sylancr 410	. . . 4 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐽 ↾_t 𝐵) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
17	13, 16	syl5eq 2184	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐿 = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
18	12, 17	oveq12d 5792	. 2 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐾 Cn 𝐿) = ((MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) Cn (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))))
19	5, 18	eqtr4d 2175	1 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐾 Cn 𝐿))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 103 = wceq 1331 ∈ wcel 1480 ⊆ wss 3071 × cxp 4537 ↾ cres 4541 ∘ ccom 4543 ‘cfv 5123 (class class class)co 5774 ℂcc 7621 − cmin 7936 abscabs 10772 ↾_t crest 12123 ∞Metcxmet 12152 MetOpencmopn 12157 Cn ccn 12357 –cn→ccncf 12729

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-coll 4043 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-iinf 4502 ax-cnex 7714 ax-resscn 7715 ax-1cn 7716 ax-1re 7717 ax-icn 7718 ax-addcl 7719 ax-addrcl 7720 ax-mulcl 7721 ax-mulrcl 7722 ax-addcom 7723 ax-mulcom 7724 ax-addass 7725 ax-mulass 7726 ax-distr 7727 ax-i2m1 7728 ax-0lt1 7729 ax-1rid 7730 ax-0id 7731 ax-rnegex 7732 ax-precex 7733 ax-cnre 7734 ax-pre-ltirr 7735 ax-pre-ltwlin 7736 ax-pre-lttrn 7737 ax-pre-apti 7738 ax-pre-ltadd 7739 ax-pre-mulgt0 7740 ax-pre-mulext 7741 ax-arch 7742 ax-caucvg 7743

This theorem depends on definitions: df-bi 116 df-stab 816 df-dc 820 df-3or 963 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-reu 2423 df-rmo 2424 df-rab 2425 df-v 2688 df-sbc 2910 df-csb 3004 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-if 3475 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-iun 3815 df-br 3930 df-opab 3990 df-mpt 3991 df-tr 4027 df-id 4215 df-po 4218 df-iso 4219 df-iord 4288 df-on 4290 df-ilim 4291 df-suc 4293 df-iom 4505 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-rn 4550 df-res 4551 df-ima 4552 df-iota 5088 df-fun 5125 df-fn 5126 df-f 5127 df-f1 5128 df-fo 5129 df-f1o 5130 df-fv 5131 df-isom 5132 df-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-1st 6038 df-2nd 6039 df-recs 6202 df-frec 6288 df-map 6544 df-sup 6871 df-inf 6872 df-pnf 7805 df-mnf 7806 df-xr 7807 df-ltxr 7808 df-le 7809 df-sub 7938 df-neg 7939 df-reap 8340 df-ap 8347 df-div 8436 df-inn 8724 df-2 8782 df-3 8783 df-4 8784 df-n0 8981 df-z 9058 df-uz 9330 df-q 9415 df-rp 9445 df-xneg 9562 df-xadd 9563 df-seqfrec 10222 df-exp 10296 df-cj 10617 df-re 10618 df-im 10619 df-rsqrt 10773 df-abs 10774 df-rest 12125 df-topgen 12144 df-psmet 12159 df-xmet 12160 df-met 12161 df-bl 12162 df-mopn 12163 df-top 12168 df-topon 12181 df-bases 12213 df-cn 12360 df-cnp 12361 df-cncf 12730

This theorem is referenced by: cncfcn1cntop 12753 cncfmpt2fcntop 12757 cnrehmeocntop 12765 cnlimcim 12812 cnlimc 12813 dvcn 12836

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