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Theorem limcvallem 25035

Description: Lemma for ellimc 25037. (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 4465	. . . 4 ⊢ (𝑧 = 𝐵 → if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) = 𝐶)
2	1	eleq1d 2823	. . 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 23946	. . . . . . 7 ⊢ 𝐾 ∈ (TopOn‘ℂ)
6		simpl2 1191	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐴 ⊆ ℂ)
7		simpl3 1192	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐵 ∈ ℂ)
8	7	snssd 4742	. . . . . . . 8 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → {𝐵} ⊆ ℂ)
9	6, 8	unssd 4120	. . . . . . 7 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → (𝐴 ∪ {𝐵}) ⊆ ℂ)
10		resttopon 22312	. . . . . . 7 ⊢ ((𝐾 ∈ (TopOn‘ℂ) ∧ (𝐴 ∪ {𝐵}) ⊆ ℂ) → (𝐾 ↾_t (𝐴 ∪ {𝐵})) ∈ (TopOn‘(𝐴 ∪ {𝐵})))
11	5, 9, 10	sylancr 587	. . . . . 6 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → (𝐾 ↾_t (𝐴 ∪ {𝐵})) ∈ (TopOn‘(𝐴 ∪ {𝐵})))
12	3, 11	eqeltrid 2843	. . . . 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 485	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵))
15		cnpf2 22401	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘(𝐴 ∪ {𝐵})) ∧ 𝐾 ∈ (TopOn‘ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐺:(𝐴 ∪ {𝐵})⟶ℂ)
16	12, 13, 14, 15	syl3anc 1370	. . . 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 6984	. . . 4 ⊢ (∀𝑧 ∈ (𝐴 ∪ {𝐵})if(𝑧 = 𝐵, 𝐶, (𝐹‘𝑧)) ∈ ℂ ↔ 𝐺:(𝐴 ∪ {𝐵})⟶ℂ)
19	16, 18	sylibr 233	. . 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 4107	. . . 4 ⊢ {𝐵} ⊆ (𝐴 ∪ {𝐵})
21		snssg 4718	. . . . 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 257	. . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐵 ∈ (𝐴 ∪ {𝐵}))
24	2, 19, 23	rspcdva 3562	. 2 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ ℂ ∧ 𝐵 ∈ ℂ) ∧ 𝐺 ∈ ((𝐽 CnP 𝐾)‘𝐵)) → 𝐶 ∈ ℂ)
25	24	ex 413	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 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ∀wral 3064 ∪ cun 3885 ⊆ wss 3887 ifcif 4459 {csn 4561 ↦ cmpt 5157 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ↾_t crest 17131 TopOpenctopn 17132 ℂ_fldccnfld 20597 TopOnctopon 22059 CnP ccnp 22376

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fi 9170 df-sup 9201 df-inf 9202 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-4 12038 df-5 12039 df-6 12040 df-7 12041 df-8 12042 df-9 12043 df-n0 12234 df-z 12320 df-dec 12438 df-uz 12583 df-q 12689 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-fz 13240 df-seq 13722 df-exp 13783 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-struct 16848 df-slot 16883 df-ndx 16895 df-base 16913 df-plusg 16975 df-mulr 16976 df-starv 16977 df-tset 16981 df-ple 16982 df-ds 16984 df-unif 16985 df-rest 17133 df-topn 17134 df-topgen 17154 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 df-mopn 20593 df-cnfld 20598 df-top 22043 df-topon 22060 df-topsp 22082 df-bases 22096 df-cnp 22379 df-xms 23473 df-ms 23474

This theorem is referenced by: limcfval 25036 ellimc 25037

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