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Mirrors > Home > MPE Home > Th. List > iseraltlem1 | Structured version Visualization version GIF version |
Description: Lemma for iseralt 15396. 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 2738 | . 2 ⊢ (ℤ≥‘𝑁) = (ℤ≥‘𝑁) | |
2 | eluzelz 12592 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
3 | iseralt.1 | . . . 4 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
4 | 2, 3 | eleq2s 2857 | . . 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 6961 | . . . 4 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (𝐺‘𝑁) ∈ ℝ) |
10 | 9 | recnd 11003 | . . 3 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (𝐺‘𝑁) ∈ ℂ) |
11 | 1z 12350 | . . 3 ⊢ 1 ∈ ℤ | |
12 | uzssz 12603 | . . . 4 ⊢ (ℤ≥‘1) ⊆ ℤ | |
13 | zex 12328 | . . . 4 ⊢ ℤ ∈ V | |
14 | 12, 13 | climconst2 15257 | . . 3 ⊢ (((𝐺‘𝑁) ∈ ℂ ∧ 1 ∈ ℤ) → (ℤ × {(𝐺‘𝑁)}) ⇝ (𝐺‘𝑁)) |
15 | 10, 11, 14 | sylancl 586 | . 2 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → (ℤ × {(𝐺‘𝑁)}) ⇝ (𝐺‘𝑁)) |
16 | 8 | ad2antrr 723 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝐺:𝑍⟶ℝ) |
17 | 3 | uztrn2 12601 | . . . 4 ⊢ ((𝑁 ∈ 𝑍 ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ 𝑍) |
18 | 17 | adantll 711 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ 𝑍) |
19 | 16, 18 | ffvelrnd 6962 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ∈ ℝ) |
20 | eluzelz 12592 | . . . . 5 ⊢ (𝑛 ∈ (ℤ≥‘𝑁) → 𝑛 ∈ ℤ) | |
21 | 20 | adantl 482 | . . . 4 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑛 ∈ ℤ) |
22 | fvex 6787 | . . . . 5 ⊢ (𝐺‘𝑁) ∈ V | |
23 | 22 | fvconst2 7079 | . . . 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 2839 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → ((ℤ × {(𝐺‘𝑁)})‘𝑛) ∈ ℝ) |
27 | simpr 485 | . . . 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 766 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → 𝑁 ∈ 𝑍) | |
30 | elfzuz 13252 | . . . . . 6 ⊢ (𝑘 ∈ (𝑁...𝑛) → 𝑘 ∈ (ℤ≥‘𝑁)) | |
31 | 3 | uztrn2 12601 | . . . . . 6 ⊢ ((𝑁 ∈ 𝑍 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → 𝑘 ∈ 𝑍) |
32 | 29, 30, 31 | syl2an 596 | . . . . 5 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...𝑛)) → 𝑘 ∈ 𝑍) |
33 | 28, 32 | ffvelrnd 6962 | . . . 4 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...𝑛)) → (𝐺‘𝑘) ∈ ℝ) |
34 | simpl 483 | . . . . 5 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝜑 ∧ 𝑁 ∈ 𝑍)) | |
35 | elfzuz 13252 | . . . . 5 ⊢ (𝑘 ∈ (𝑁...(𝑛 − 1)) → 𝑘 ∈ (ℤ≥‘𝑁)) | |
36 | 31 | adantll 711 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → 𝑘 ∈ 𝑍) |
37 | iseralt.4 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) | |
38 | 37 | adantlr 712 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
39 | 36, 38 | syldan 591 | . . . . 5 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
40 | 34, 35, 39 | syl2an 596 | . . . 4 ⊢ ((((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑁...(𝑛 − 1))) → (𝐺‘(𝑘 + 1)) ≤ (𝐺‘𝑘)) |
41 | 27, 33, 40 | monoord2 13754 | . . 3 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ≤ (𝐺‘𝑁)) |
42 | 41, 24 | breqtrrd 5102 | . 2 ⊢ (((𝜑 ∧ 𝑁 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ≥‘𝑁)) → (𝐺‘𝑛) ≤ ((ℤ × {(𝐺‘𝑁)})‘𝑛)) |
43 | 1, 5, 7, 15, 19, 26, 42 | climle 15349 | 1 ⊢ ((𝜑 ∧ 𝑁 ∈ 𝑍) → 0 ≤ (𝐺‘𝑁)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 {csn 4561 class class class wbr 5074 × cxp 5587 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 1c1 10872 + caddc 10874 ≤ cle 11010 − cmin 11205 ℤcz 12319 ℤ≥cuz 12582 ...cfz 13239 ⇝ cli 15193 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-pm 8618 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-inf 9202 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fl 13512 df-seq 13722 df-exp 13783 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-rlim 15198 |
This theorem is referenced by: iseraltlem3 15395 iseralt 15396 |
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