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| Mirrors > Home > MPE Home > Th. List > climsub | Structured version Visualization version GIF version | ||
| Description: Limit of the difference of two converging sequences. Proposition 12-2.1(b) of [Gleason] p. 168. (Contributed by NM, 4-Aug-2007.) (Proof shortened by Mario Carneiro, 1-Feb-2014.) |
| Ref | Expression |
|---|---|
| climadd.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
| climadd.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| climadd.4 | ⊢ (𝜑 → 𝐹 ⇝ 𝐴) |
| climadd.6 | ⊢ (𝜑 → 𝐻 ∈ 𝑋) |
| climadd.7 | ⊢ (𝜑 → 𝐺 ⇝ 𝐵) |
| climadd.8 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) |
| climadd.9 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘𝑘) ∈ ℂ) |
| climsub.h | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐻‘𝑘) = ((𝐹‘𝑘) − (𝐺‘𝑘))) |
| Ref | Expression |
|---|---|
| climsub | ⊢ (𝜑 → 𝐻 ⇝ (𝐴 − 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | climadd.1 | . 2 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 2 | climadd.2 | . 2 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 3 | climadd.4 | . . 3 ⊢ (𝜑 → 𝐹 ⇝ 𝐴) | |
| 4 | climcl 15589 | . . 3 ⊢ (𝐹 ⇝ 𝐴 → 𝐴 ∈ ℂ) | |
| 5 | 3, 4 | syl 18 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 6 | climadd.7 | . . 3 ⊢ (𝜑 → 𝐺 ⇝ 𝐵) | |
| 7 | climcl 15589 | . . 3 ⊢ (𝐺 ⇝ 𝐵 → 𝐵 ∈ ℂ) | |
| 8 | 6, 7 | syl 18 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 9 | subcl 11483 | . . 3 ⊢ ((𝑢 ∈ ℂ ∧ 𝑣 ∈ ℂ) → (𝑢 − 𝑣) ∈ ℂ) | |
| 10 | 9 | adantl 487 | . 2 ⊢ ((𝜑 ∧ (𝑢 ∈ ℂ ∧ 𝑣 ∈ ℂ)) → (𝑢 − 𝑣) ∈ ℂ) |
| 11 | climadd.6 | . 2 ⊢ (𝜑 → 𝐻 ∈ 𝑋) | |
| 12 | simpr 490 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ+) → 𝑥 ∈ ℝ+) | |
| 13 | 5 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ+) → 𝐴 ∈ ℂ) |
| 14 | 8 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ+) → 𝐵 ∈ ℂ) |
| 15 | subcn2 15685 | . . 3 ⊢ ((𝑥 ∈ ℝ+ ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ∃𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑢 ∈ ℂ ∀𝑣 ∈ ℂ (((abs‘(𝑢 − 𝐴)) < 𝑦 ∧ (abs‘(𝑣 − 𝐵)) < 𝑧) → (abs‘((𝑢 − 𝑣) − (𝐴 − 𝐵))) < 𝑥)) | |
| 16 | 12, 13, 14, 15 | syl3anc 1398 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ+) → ∃𝑦 ∈ ℝ+ ∃𝑧 ∈ ℝ+ ∀𝑢 ∈ ℂ ∀𝑣 ∈ ℂ (((abs‘(𝑢 − 𝐴)) < 𝑦 ∧ (abs‘(𝑣 − 𝐵)) < 𝑧) → (abs‘((𝑢 − 𝑣) − (𝐴 − 𝐵))) < 𝑥)) |
| 17 | climadd.8 | . 2 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) | |
| 18 | climadd.9 | . 2 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘𝑘) ∈ ℂ) | |
| 19 | climsub.h | . 2 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐻‘𝑘) = ((𝐹‘𝑘) − (𝐺‘𝑘))) | |
| 20 | 1, 2, 5, 8, 10, 3, 6, 11, 16, 17, 18, 19 | climcn2 15683 | 1 ⊢ (𝜑 → 𝐻 ⇝ (𝐴 − 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∃wrex 3086 class class class wbr 5103 ‘cfv 6533 (class class class)co 7414 ℂcc 11125 < clt 11270 − cmin 11468 ℤcz 12618 ℤ≥cuz 12890 ℝ+crp 13045 abscabs 15324 ⇝ cli 15574 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-n0 12532 df-z 12619 df-uz 12891 df-rp 13046 df-seq 14069 df-exp 14129 df-cj 15189 df-re 15190 df-im 15191 df-sqrt 15325 df-abs 15326 df-clim 15578 |
| This theorem is used by: climsubc1 15728 climsubc2 15729 climle 15730 supcvg 15948 mbfi1flimlem 25953 ulmdvlem1 26639 abelthlem6 26675 atantayl 27177 lgamcvg2 27294 hashnzfzclim 45149 binomcxplemrat 45177 climsubmpt 46491 ioodvbdlimc2lem 46765 |
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