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Theorem rlimadd 15605

Description: Limit of the sum of two converging functions. Proposition 12-2.1(a) of [Gleason] p. 168. (Contributed by Mario Carneiro, 22-Sep-2014.)

**Hypotheses**
Ref	Expression
rlimadd.3	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉)
rlimadd.4	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ 𝑉)
rlimadd.5	⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ⇝_𝑟 𝐷)
rlimadd.6	⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ⇝_𝑟 𝐸)

**Assertion**
Ref	Expression
rlimadd	⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ⇝_𝑟 (𝐷 + 𝐸))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐷 𝜑,𝑥 𝑥,𝐸 Allowed substitution hints: 𝐵(𝑥) 𝐶(𝑥) 𝑉(𝑥)

Proof of Theorem rlimadd Dummy variables 𝑤 𝑣 𝑦 𝑧 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rlimadd.3	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉)
2		rlimadd.5	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ⇝_𝑟 𝐷)
3	1, 2	rlimmptrcl 15570	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℂ)
4		rlimadd.4	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ 𝑉)
5		rlimadd.6	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ⇝_𝑟 𝐸)
6	4, 5	rlimmptrcl 15570	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℂ)
7	3, 6	addcld 11164	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 + 𝐶) ∈ ℂ)
8		rlimcl 15465	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐵) ⇝_𝑟 𝐷 → 𝐷 ∈ ℂ)
9	2, 8	syl 17	. . 3 ⊢ (𝜑 → 𝐷 ∈ ℂ)
10		rlimcl 15465	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐶) ⇝_𝑟 𝐸 → 𝐸 ∈ ℂ)
11	5, 10	syl 17	. . 3 ⊢ (𝜑 → 𝐸 ∈ ℂ)
12	9, 11	addcld 11164	. 2 ⊢ (𝜑 → (𝐷 + 𝐸) ∈ ℂ)
13		simpr 484	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝑦 ∈ ℝ⁺)
14	9	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐷 ∈ ℂ)
15	11	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐸 ∈ ℂ)
16		addcn2 15556	. . 3 ⊢ ((𝑦 ∈ ℝ⁺ ∧ 𝐷 ∈ ℂ ∧ 𝐸 ∈ ℂ) → ∃𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ ℂ ∀𝑣 ∈ ℂ (((abs‘(𝑢 − 𝐷)) < 𝑧 ∧ (abs‘(𝑣 − 𝐸)) < 𝑤) → (abs‘((𝑢 + 𝑣) − (𝐷 + 𝐸))) < 𝑦))
17	13, 14, 15, 16	syl3anc 1374	. 2 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → ∃𝑧 ∈ ℝ⁺ ∃𝑤 ∈ ℝ⁺ ∀𝑢 ∈ ℂ ∀𝑣 ∈ ℂ (((abs‘(𝑢 − 𝐷)) < 𝑧 ∧ (abs‘(𝑣 − 𝐸)) < 𝑤) → (abs‘((𝑢 + 𝑣) − (𝐷 + 𝐸))) < 𝑦))
18	3, 6, 7, 12, 2, 5, 17	rlimcn3 15552	1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ⇝_𝑟 (𝐷 + 𝐸))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 ∀wral 3051 ∃wrex 3061 class class class wbr 5085 ↦ cmpt 5166 ‘cfv 6498 (class class class)co 7367 ℂcc 11036 + caddc 11041 < clt 11179 − cmin 11377 ℝ⁺crp 12942 abscabs 15196 ⇝_𝑟 crli 15447

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-pm 8776 df-en 8894 df-dom 8895 df-sdom 8896 df-sup 9355 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-n0 12438 df-z 12525 df-uz 12789 df-rp 12943 df-seq 13964 df-exp 14024 df-cj 15061 df-re 15062 df-im 15063 df-sqrt 15197 df-abs 15198 df-rlim 15451

This theorem is referenced by: caucvgr 15638 fsumrlim 15774 logfacrlim 27187 logexprlim 27188 chpchtlim 27442 selberglem2 27509 signsplypnf 34694

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