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Mirrors > Home > MPE Home > Th. List > iseraltlem1 | Structured version Visualization version GIF version |
Description: Lemma for iseralt 14415. A decreasing sequence with limit zero consists of positive terms. (Contributed by Mario Carneiro, 6-Apr-2015.) |
Ref | Expression |
---|---|
iseralt.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
iseralt.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
iseralt.3 | ⊢ (𝜑 → 𝐺:𝑍⟶ℝ) |
iseralt.4 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
iseralt.5 | ⊢ (𝜑 → 𝐺 ⇝ 0) |
Ref | Expression |
---|---|
iseraltlem1 | ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → 0 ≤ (𝐺‘𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2622 | . 2 ⊢ (ℤ≥‘𝑁) = (ℤ≥‘𝑁) | |
2 | eluzelz 11697 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
3 | iseralt.1 | . . . 4 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
4 | 2, 3 | eleq2s 2719 | . . 3 ⊢ (𝑁 ∈ 𝑍 → 𝑁 ∈ ℤ) |
5 | 4 | adantl 482 | . 2 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → 𝑁 ∈ ℤ) |
6 | iseralt.5 | . . 3 ⊢ (𝜑 → 𝐺 ⇝ 0) | |
7 | 6 | adantr 481 | . 2 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → 𝐺 ⇝ 0) |
8 | iseralt.3 | . . . . 5 ⊢ (𝜑 → 𝐺:𝑍⟶ℝ) | |
9 | 8 | ffvelrnda 6359 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (𝐺‘𝑁) ∈ ℝ) |
10 | 9 | recnd 10068 | . . 3 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (𝐺‘𝑁) ∈ ℂ) |
11 | 1z 11407 | . . 3 ⊢ 1 ∈ ℤ | |
12 | uzssz 11707 | . . . 4 ⊢ (ℤ≥‘1) ⊆ ℤ | |
13 | zex 11386 | . . . 4 ⊢ ℤ ∈ V | |
14 | 12, 13 | climconst2 14279 | . . 3 ⊢ (((𝐺‘𝑁) ∈ ℂ ∧ 1 ∈ ℤ) → (ℤ × {(𝐺‘𝑁)}) ⇝ (𝐺‘𝑁)) |
15 | 10, 11, 14 | sylancl 694 | . 2 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (ℤ × {(𝐺‘𝑁)}) ⇝ (𝐺‘𝑁)) |
16 | 8 | ad2antrr 762 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝐺:𝑍⟶ℝ) |
17 | 3 | uztrn2 11705 | . . . 4 ⊢ ((𝑁 ∈ 𝑍 ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ 𝑍) |
18 | 17 | adantll 750 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ 𝑍) |
19 | 16, 18 | ffvelrnd 6360 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ∈ ℝ) |
20 | eluzelz 11697 | . . . . 5 ⊢ (𝑛 ∈ (ℤ≥‘𝑁) → 𝑛 ∈ ℤ) | |
21 | 20 | adantl 482 | . . . 4 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ ℤ) |
22 | fvex 6201 | . . . . 5 ⊢ (𝐺‘𝑁) ∈ V | |
23 | 22 | fvconst2 6469 | . . . 4 ⊢ (𝑛 ∈ ℤ → ((ℤ × {(𝐺‘𝑁)})‘𝑛) = (𝐺‘𝑁)) |
24 | 21, 23 | syl 17 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → ((ℤ × {(𝐺‘𝑁)})‘𝑛) = (𝐺‘𝑁)) |
25 | 9 | adantr 481 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑁) ∈ ℝ) |
26 | 24, 25 | eqeltrd 2701 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → ((ℤ × {(𝐺‘𝑁)})‘𝑛) ∈ ℝ) |
27 | simpr 477 | . . . 4 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ (ℤ≥‘𝑁)) | |
28 | 16 | adantr 481 | . . . . 5 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...𝑛)) → 𝐺:𝑍⟶ℝ) |
29 | simplr 792 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑁 ∈ 𝑍) | |
30 | elfzuz 12338 | . . . . . 6 ⊢ (𝑘 ∈ (𝑁...𝑛) → 𝑘 ∈ (ℤ≥‘𝑁)) | |
31 | 3 | uztrn2 11705 | . . . . . 6 ⊢ ((𝑁 ∈ 𝑍 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → 𝑘 ∈ 𝑍) |
32 | 29, 30, 31 | syl2an 494 | . . . . 5 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...𝑛)) → 𝑘 ∈ 𝑍) |
33 | 28, 32 | ffvelrnd 6360 | . . . 4 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...𝑛)) → (𝐺‘𝑘) ∈ ℝ) |
34 | simpl 473 | . . . . 5 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝜑 ∧ 𝑁 ∈ 𝑍)) | |
35 | elfzuz 12338 | . . . . 5 ⊢ (𝑘 ∈ (𝑁...(𝑛 − 1)) → 𝑘 ∈ (ℤ≥‘𝑁)) | |
36 | 31 | adantll 750 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → 𝑘 ∈ 𝑍) |
37 | iseralt.4 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) | |
38 | 37 | adantlr 751 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
39 | 36, 38 | syldan 487 | . . . . 5 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
40 | 34, 35, 39 | syl2an 494 | . . . 4 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...(𝑛 − 1))) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
41 | 27, 33, 40 | monoord2 12832 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ≤ (𝐺‘𝑁)) |
42 | 41, 24 | breqtrrd 4681 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ≤ ((ℤ × {(𝐺‘𝑁)})‘𝑛)) |
43 | 1, 5, 7, 15, 19, 26, 42 | climle 14370 | 1 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → 0 ≤ (𝐺‘𝑁)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 384 = wceq 1483 ∈ wcel 1990 {csn 4177 class class class wbr 4653 × cxp 5112 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 ℂcc 9934 ℝcr 9935 0cc0 9936 1c1 9937 + caddc 9939 ≤ cle 10075 − cmin 10266 ℤcz 11377 ℤ≥cuz 11687 ...cfz 12326 ⇝ cli 14215 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-pm 7860 df-en 7956 df-dom 7957 df-sdom 7958 df-sup 8348 df-inf 8349 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-n0 11293 df-z 11378 df-uz 11688 df-rp 11833 df-fz 12327 df-fl 12593 df-seq 12802 df-exp 12861 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-clim 14219 df-rlim 14220 |
This theorem is referenced by: iseraltlem3 14414 iseralt 14415 |
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