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Theorem cncfcncntop 13747

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 2177	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐴 × 𝐴)) = ((abs ∘ − ) ↾ (𝐴 × 𝐴))
2		eqid 2177	. . 3 ⊢ ((abs ∘ − ) ↾ (𝐵 × 𝐵)) = ((abs ∘ − ) ↾ (𝐵 × 𝐵))
3		eqid 2177	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) = (MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴)))
4		eqid 2177	. . 3 ⊢ (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))) = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))
5	1, 2, 3, 4	cncfmet 13746	. 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 13698	. . . . 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 13673	. . . . 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 2222	. . 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 13673	. . . . 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 2222	. . 3 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → 𝐿 = (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵))))
18	12, 17	oveq12d 5887	. 2 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐾 Cn 𝐿) = ((MetOpen‘((abs ∘ − ) ↾ (𝐴 × 𝐴))) Cn (MetOpen‘((abs ∘ − ) ↾ (𝐵 × 𝐵)))))
19	5, 18	eqtr4d 2213	1 ⊢ ((𝐴 ⊆ ℂ ∧ 𝐵 ⊆ ℂ) → (𝐴–cn→𝐵) = (𝐾 Cn 𝐿))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 ∈ wcel 2148 ⊆ wss 3129 × cxp 4621 ↾ cres 4625 ∘ ccom 4627 ‘cfv 5212 (class class class)co 5869 ℂcc 7800 − cmin 8118 abscabs 10990 ↾_t crest 12636 ∞Metcxmet 13147 MetOpencmopn 13152 Cn ccn 13352 –cn→ccncf 13724

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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4115 ax-sep 4118 ax-nul 4126 ax-pow 4171 ax-pr 4206 ax-un 4430 ax-setind 4533 ax-iinf 4584 ax-cnex 7893 ax-resscn 7894 ax-1cn 7895 ax-1re 7896 ax-icn 7897 ax-addcl 7898 ax-addrcl 7899 ax-mulcl 7900 ax-mulrcl 7901 ax-addcom 7902 ax-mulcom 7903 ax-addass 7904 ax-mulass 7905 ax-distr 7906 ax-i2m1 7907 ax-0lt1 7908 ax-1rid 7909 ax-0id 7910 ax-rnegex 7911 ax-precex 7912 ax-cnre 7913 ax-pre-ltirr 7914 ax-pre-ltwlin 7915 ax-pre-lttrn 7916 ax-pre-apti 7917 ax-pre-ltadd 7918 ax-pre-mulgt0 7919 ax-pre-mulext 7920 ax-arch 7921 ax-caucvg 7922

This theorem depends on definitions: df-bi 117 df-stab 831 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-if 3535 df-pw 3576 df-sn 3597 df-pr 3598 df-op 3600 df-uni 3808 df-int 3843 df-iun 3886 df-br 4001 df-opab 4062 df-mpt 4063 df-tr 4099 df-id 4290 df-po 4293 df-iso 4294 df-iord 4363 df-on 4365 df-ilim 4366 df-suc 4368 df-iom 4587 df-xp 4629 df-rel 4630 df-cnv 4631 df-co 4632 df-dm 4633 df-rn 4634 df-res 4635 df-ima 4636 df-iota 5174 df-fun 5214 df-fn 5215 df-f 5216 df-f1 5217 df-fo 5218 df-f1o 5219 df-fv 5220 df-isom 5221 df-riota 5825 df-ov 5872 df-oprab 5873 df-mpo 5874 df-1st 6135 df-2nd 6136 df-recs 6300 df-frec 6386 df-map 6644 df-sup 6977 df-inf 6978 df-pnf 7984 df-mnf 7985 df-xr 7986 df-ltxr 7987 df-le 7988 df-sub 8120 df-neg 8121 df-reap 8522 df-ap 8529 df-div 8619 df-inn 8909 df-2 8967 df-3 8968 df-4 8969 df-n0 9166 df-z 9243 df-uz 9518 df-q 9609 df-rp 9641 df-xneg 9759 df-xadd 9760 df-seqfrec 10432 df-exp 10506 df-cj 10835 df-re 10836 df-im 10837 df-rsqrt 10991 df-abs 10992 df-rest 12638 df-topgen 12657 df-psmet 13154 df-xmet 13155 df-met 13156 df-bl 13157 df-mopn 13158 df-top 13163 df-topon 13176 df-bases 13208 df-cn 13355 df-cnp 13356 df-cncf 13725

This theorem is referenced by: cncfcn1cntop 13748 cncfmpt2fcntop 13752 cnrehmeocntop 13760 cnlimcim 13807 cnlimc 13808 dvcn 13831

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