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Theorem limcvallem 24740

Description: Lemma for ellimc 24742. (Contributed by Mario Carneiro, 25-Dec-2016.)

**Hypotheses**
Ref	Expression
limcval.j	⊢ 𝐽 = (𝐾 ↾_t (𝐴 ∪ {𝐵}))
limcval.k	⊢ 𝐾 = (TopOpen‘ℂ_fld)
limcvallem.g	⊢ 𝐺 = (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)))

**Assertion**
Ref	Expression
limcvallem	⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) → (𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵) → 𝐶 ∈ ℂ))

Distinct variable groups: 𝑧,𝐴 𝑧,𝐵 𝑧,𝐹 𝑧,𝐾 𝑧,𝐶 Allowed substitution hints: 𝐺(𝑧) 𝐽(𝑧)

**Proof of Theorem limcvallem**
Step	Hyp	Ref	Expression
1		iftrue 4435	. . . 4 ⊢ (𝑧 = 𝐵 → if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) = 𝐶)
2	1	eleq1d 2818	. . 3 ⊢ (𝑧 = 𝐵 → (if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) ∈ ℂ ↔ 𝐶 ∈ ℂ))
3		limcval.j	. . . . . 6 ⊢ 𝐽 = (𝐾 ↾_t (𝐴 ∪ {𝐵}))
4		limcval.k	. . . . . . . 8 ⊢ 𝐾 = (TopOpen‘ℂ_fld)
5	4	cnfldtopon 23652	. . . . . . 7 ⊢ 𝐾 ∈ (TopOn‘ℂ)
6		simpl2 1194	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐴 ⊆ ℂ)
7		simpl3 1195	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐵 ∈ ℂ)
8	7	snssd 4712	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → {𝐵} ⊆ ℂ)
9	6, 8	unssd 4090	. . . . . . 7 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → (𝐴 ∪ {𝐵}) ⊆ ℂ)
10		resttopon 22030	. . . . . . 7 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ (𝐴 ∪ {𝐵}) ⊆ ℂ) → (𝐾 ↾_t (𝐴 ∪ {𝐵})) ∈ (TopOn‘(𝐴 ∪ {𝐵})))
11	5, 9, 10	sylancr 590	. . . . . 6 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → (𝐾 ↾_t (𝐴 ∪ {𝐵})) ∈ (TopOn‘(𝐴 ∪ {𝐵})))
12	3, 11	eqeltrid 2838	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐽 ∈ (TopOn‘(𝐴 ∪ {𝐵})))
13	5	a1i 11	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐾 ∈ (TopOn‘ℂ))
14		simpr 488	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵))
15		cnpf2 22119	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘(𝐴 ∪ {𝐵})) ∧ 𝐾 ∈ (TopOn‘ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐺:(𝐴 ∪ {𝐵})⟶ℂ)
16	12, 13, 14, 15	syl3anc 1373	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐺:(𝐴 ∪ {𝐵})⟶ℂ)
17		limcvallem.g	. . . . 5 ⊢ 𝐺 = (𝑧 ∈ (𝐴 ∪ {𝐵}) ↦ if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)))
18	17	fmpt 6916	. . . 4 ⊢ (∀𝑧 ∈ (𝐴 ∪ {𝐵})if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) ∈ ℂ ↔ 𝐺:(𝐴 ∪ {𝐵})⟶ℂ)
19	16, 18	sylibr 237	. . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → ∀𝑧 ∈ (𝐴 ∪ {𝐵})if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) ∈ ℂ)
20		ssun2 4077	. . . 4 ⊢ {𝐵} ⊆ (𝐴 ∪ {𝐵})
21		snssg 4688	. . . . 5 ⊢ (𝐵 ∈ ℂ → (𝐵 ∈ (𝐴 ∪ {𝐵}) ↔ {𝐵} ⊆ (𝐴 ∪ {𝐵})))
22	7, 21	syl 17	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → (𝐵 ∈ (𝐴 ∪ {𝐵}) ↔ {𝐵} ⊆ (𝐴 ∪ {𝐵})))
23	20, 22	mpbiri 261	. . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐵 ∈ (𝐴 ∪ {𝐵}))
24	2, 19, 23	rspcdva 3532	. 2 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐶 ∈ ℂ)
25	24	ex 416	1 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) → (𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵) → 𝐶 ∈ ℂ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ∀wral 3054 ∪ cun 3855 ⊆ wss 3857 ifcif 4429 {csn 4531 ↦ cmpt 5124 ⟶wf 6365 ‘cfv 6369 (class class class)co 7202 ℂcc 10710 ↾_t crest 16897 TopOpenctopn 16898 ℂ_fldccnfld 20335 TopOnctopon 21779 CnP ccnp 22094

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2706 ax-rep 5168 ax-sep 5181 ax-nul 5188 ax-pow 5247 ax-pr 5311 ax-un 7512 ax-cnex 10768 ax-resscn 10769 ax-1cn 10770 ax-icn 10771 ax-addcl 10772 ax-addrcl 10773 ax-mulcl 10774 ax-mulrcl 10775 ax-mulcom 10776 ax-addass 10777 ax-mulass 10778 ax-distr 10779 ax-i2m1 10780 ax-1ne0 10781 ax-1rid 10782 ax-rnegex 10783 ax-rrecex 10784 ax-cnre 10785 ax-pre-lttri 10786 ax-pre-lttrn 10787 ax-pre-ltadd 10788 ax-pre-mulgt0 10789 ax-pre-sup 10790

This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2537 df-eu 2566 df-clab 2713 df-cleq 2726 df-clel 2812 df-nfc 2882 df-ne 2936 df-nel 3040 df-ral 3059 df-rex 3060 df-reu 3061 df-rmo 3062 df-rab 3063 df-v 3403 df-sbc 3688 df-csb 3803 df-dif 3860 df-un 3862 df-in 3864 df-ss 3874 df-pss 3876 df-nul 4228 df-if 4430 df-pw 4505 df-sn 4532 df-pr 4534 df-tp 4536 df-op 4538 df-uni 4810 df-int 4850 df-iun 4896 df-br 5044 df-opab 5106 df-mpt 5125 df-tr 5151 df-id 5444 df-eprel 5449 df-po 5457 df-so 5458 df-fr 5498 df-we 5500 df-xp 5546 df-rel 5547 df-cnv 5548 df-co 5549 df-dm 5550 df-rn 5551 df-res 5552 df-ima 5553 df-pred 6149 df-ord 6205 df-on 6206 df-lim 6207 df-suc 6208 df-iota 6327 df-fun 6371 df-fn 6372 df-f 6373 df-f1 6374 df-fo 6375 df-f1o 6376 df-fv 6377 df-riota 7159 df-ov 7205 df-oprab 7206 df-mpo 7207 df-om 7634 df-1st 7750 df-2nd 7751 df-wrecs 8036 df-recs 8097 df-rdg 8135 df-1o 8191 df-er 8380 df-map 8499 df-en 8616 df-dom 8617 df-sdom 8618 df-fin 8619 df-fi 9016 df-sup 9047 df-inf 9048 df-pnf 10852 df-mnf 10853 df-xr 10854 df-ltxr 10855 df-le 10856 df-sub 11047 df-neg 11048 df-div 11473 df-nn 11814 df-2 11876 df-3 11877 df-4 11878 df-5 11879 df-6 11880 df-7 11881 df-8 11882 df-9 11883 df-n0 12074 df-z 12160 df-dec 12277 df-uz 12422 df-q 12528 df-rp 12570 df-xneg 12687 df-xadd 12688 df-xmul 12689 df-fz 13079 df-seq 13558 df-exp 13619 df-cj 14645 df-re 14646 df-im 14647 df-sqrt 14781 df-abs 14782 df-struct 16686 df-ndx 16687 df-slot 16688 df-base 16690 df-plusg 16780 df-mulr 16781 df-starv 16782 df-tset 16786 df-ple 16787 df-ds 16789 df-unif 16790 df-rest 16899 df-topn 16900 df-topgen 16920 df-psmet 20327 df-xmet 20328 df-met 20329 df-bl 20330 df-mopn 20331 df-cnfld 20336 df-top 21763 df-topon 21780 df-topsp 21802 df-bases 21815 df-cnp 22097 df-xms 23190 df-ms 23191

This theorem is referenced by: limcfval 24741 ellimc 24742

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