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Theorem rlimadd 15642

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 15607	. 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 15607	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℂ)
7	3, 6	addcld 11187	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 + 𝐶) ∈ ℂ)
8		rlimcl 15502	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐵) ⇝_𝑟 𝐷 → 𝐷 ∈ ℂ)
9	2, 8	syl 17	. . 3 ⊢ (𝜑 → 𝐷 ∈ ℂ)
10		rlimcl 15502	. . . 4 ⊢ ((𝑥 ∈ 𝐴 ↦ 𝐶) ⇝_𝑟 𝐸 → 𝐸 ∈ ℂ)
11	5, 10	syl 17	. . 3 ⊢ (𝜑 → 𝐸 ∈ ℂ)
12	9, 11	addcld 11187	. 2 ⊢ (𝜑 → (𝐷 + 𝐸) ∈ ℂ)
13		simpr 487	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝑦 ∈ ℝ⁺)
14	9	adantr 483	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐷 ∈ ℂ)
15	11	adantr 483	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ⁺) → 𝐸 ∈ ℂ)
16		addcn2 15593	. . 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 1382	. 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 15589	1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ⇝_𝑟 (𝐷 + 𝐸))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2132 ∀wral 3066 ∃wrex 3076 class class class wbr 5090 ↦ cmpt 5171 ‘cfv 6506 (class class class)co 7381 ℂcc 11057 + caddc 11062 < clt 11202 − cmin 11400 ℝ⁺crp 12979 abscabs 15233 ⇝_𝑟 crli 15484

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 ax-sep 5236 ax-nul 5246 ax-pow 5312 ax-pr 5380 ax-un 7703 ax-cnex 11115 ax-resscn 11116 ax-1cn 11117 ax-icn 11118 ax-addcl 11119 ax-addrcl 11120 ax-mulcl 11121 ax-mulrcl 11122 ax-mulcom 11123 ax-addass 11124 ax-mulass 11125 ax-distr 11126 ax-i2m1 11127 ax-1ne0 11128 ax-1rid 11129 ax-rnegex 11130 ax-rrecex 11131 ax-cnre 11132 ax-pre-lttri 11133 ax-pre-lttrn 11134 ax-pre-ltadd 11135 ax-pre-mulgt0 11136 ax-pre-sup 11137

This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-mo 2556 df-eu 2586 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ne 2948 df-nel 3052 df-ral 3067 df-rex 3077 df-rmo 3357 df-reu 3358 df-rab 3405 df-v 3446 df-sbc 3736 df-csb 3844 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-pss 3915 df-nul 4277 df-if 4471 df-pw 4547 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-iun 4941 df-br 5091 df-opab 5153 df-mpt 5172 df-tr 5198 df-id 5531 df-eprel 5536 df-po 5544 df-so 5545 df-fr 5589 df-we 5591 df-xp 5642 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-res 5648 df-ima 5649 df-pred 6273 df-ord 6334 df-on 6335 df-lim 6336 df-suc 6337 df-iota 6462 df-fun 6508 df-fn 6509 df-f 6510 df-f1 6511 df-fo 6512 df-f1o 6513 df-fv 6514 df-riota 7338 df-ov 7384 df-oprab 7385 df-mpo 7386 df-om 7832 df-2nd 7956 df-frecs 8246 df-wrecs 8277 df-recs 8326 df-rdg 8365 df-er 8662 df-pm 8795 df-en 8913 df-dom 8914 df-sdom 8915 df-sup 9374 df-pnf 11204 df-mnf 11205 df-xr 11206 df-ltxr 11207 df-le 11208 df-sub 11402 df-neg 11403 df-div 11831 df-nn 12197 df-2 12266 df-3 12267 df-n0 12468 df-z 12555 df-uz 12826 df-rp 12980 df-seq 14001 df-exp 14061 df-cj 15098 df-re 15099 df-im 15100 df-sqrt 15234 df-abs 15235 df-rlim 15488

This theorem is referenced by: caucvgr 15675 fsumrlim 15811 logfacrlim 27254 logexprlim 27255 chpchtlim 27509 selberglem2 27576 signsplypnf 34791

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