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Theorem rlimadd 15625

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 15590	. 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 15590	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℂ)
7	3, 6	addcld 11269	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 + 𝐶) ∈ ℂ)
8		rlimcl 15485	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐵) ⇝_𝑟 𝐷 → 𝐷 ∈ ℂ)
9	2, 8	syl 17	. . 3 ⊢ (𝜑 → 𝐷 ∈ ℂ)
10		rlimcl 15485	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐶) ⇝_𝑟 𝐸 → 𝐸 ∈ ℂ)
11	5, 10	syl 17	. . 3 ⊢ (𝜑 → 𝐸 ∈ ℂ)
12	9, 11	addcld 11269	. 2 ⊢ (𝜑 → (𝐷 + 𝐸) ∈ ℂ)
13		simpr 483	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝑦 ∈ ℝ⁺)
14	9	adantr 479	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐷 ∈ ℂ)
15	11	adantr 479	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐸 ∈ ℂ)
16		addcn2 15576	. . 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 1368	. 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 15572	1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ⇝_𝑟 (𝐷 + 𝐸))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 ∈ wcel 2098 ∀wral 3057 ∃wrex 3066 class class class wbr 5150 ↦ cmpt 5233 ‘cfv 6551 (class class class)co 7424 ℂcc 11142 + caddc 11147 < clt 11284 − cmin 11480 ℝ⁺crp 13012 abscabs 15219 ⇝_𝑟 crli 15467

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2698 ax-sep 5301 ax-nul 5308 ax-pow 5367 ax-pr 5431 ax-un 7744 ax-cnex 11200 ax-resscn 11201 ax-1cn 11202 ax-icn 11203 ax-addcl 11204 ax-addrcl 11205 ax-mulcl 11206 ax-mulrcl 11207 ax-mulcom 11208 ax-addass 11209 ax-mulass 11210 ax-distr 11211 ax-i2m1 11212 ax-1ne0 11213 ax-1rid 11214 ax-rnegex 11215 ax-rrecex 11216 ax-cnre 11217 ax-pre-lttri 11218 ax-pre-lttrn 11219 ax-pre-ltadd 11220 ax-pre-mulgt0 11221 ax-pre-sup 11222

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4325 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4911 df-iun 5000 df-br 5151 df-opab 5213 df-mpt 5234 df-tr 5268 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5635 df-we 5637 df-xp 5686 df-rel 5687 df-cnv 5688 df-co 5689 df-dm 5690 df-rn 5691 df-res 5692 df-ima 5693 df-pred 6308 df-ord 6375 df-on 6376 df-lim 6377 df-suc 6378 df-iota 6503 df-fun 6553 df-fn 6554 df-f 6555 df-f1 6556 df-fo 6557 df-f1o 6558 df-fv 6559 df-riota 7380 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7875 df-2nd 7998 df-frecs 8291 df-wrecs 8322 df-recs 8396 df-rdg 8435 df-er 8729 df-pm 8852 df-en 8969 df-dom 8970 df-sdom 8971 df-sup 9471 df-pnf 11286 df-mnf 11287 df-xr 11288 df-ltxr 11289 df-le 11290 df-sub 11482 df-neg 11483 df-div 11908 df-nn 12249 df-2 12311 df-3 12312 df-n0 12509 df-z 12595 df-uz 12859 df-rp 13013 df-seq 14005 df-exp 14065 df-cj 15084 df-re 15085 df-im 15086 df-sqrt 15220 df-abs 15221 df-rlim 15471

This theorem is referenced by: caucvgr 15660 fsumrlim 15795 logfacrlim 27175 logexprlim 27176 chpchtlim 27430 selberglem2 27497 signsplypnf 34187

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