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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 15576 | . . 3 ⊢ (𝐹 ⇝ 𝐴 → 𝐴 ∈ ℂ) | |
| 5 | 3, 4 | syl 18 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 6 | climadd.7 | . . 3 ⊢ (𝜑 → 𝐺 ⇝ 𝐵) | |
| 7 | climcl 15576 | . . 3 ⊢ (𝐺 ⇝ 𝐵 → 𝐵 ∈ ℂ) | |
| 8 | 6, 7 | syl 18 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 9 | subcl 11473 | . . 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 15672 | . . 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 15670 | 1 ⊢ (𝜑 → 𝐻 ⇝ (𝐴 − 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ∀wral 3081 ∃wrex 3091 class class class wbr 5111 ‘cfv 6540 (class class class)co 7419 ℂcc 11115 < clt 11260 − cmin 11458 ℤcz 12608 ℤ≥cuz 12880 ℝ+crp 13034 abscabs 15311 ⇝ cli 15561 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 ax-pre-mulgt0 11194 ax-pre-sup 11195 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-sup 9409 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 df-sub 11460 df-neg 11461 df-div 11889 df-nn 12251 df-2 12320 df-3 12321 df-n0 12522 df-z 12609 df-uz 12881 df-rp 13035 df-seq 14058 df-exp 14118 df-cj 15176 df-re 15177 df-im 15178 df-sqrt 15312 df-abs 15313 df-clim 15565 |
| This theorem is used by: climsubc1 15715 climsubc2 15716 climle 15717 supcvg 15935 mbfi1flimlem 25934 ulmdvlem1 26616 abelthlem6 26652 atantayl 27155 lgamcvg2 27272 hashnzfzclim 45092 binomcxplemrat 45120 climsubmpt 46434 ioodvbdlimc2lem 46708 |
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