Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > climinf2 | Structured version Visualization version GIF version |
Description: A convergent, nonincreasing sequence, converges to the infimum of its range. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
Ref | Expression |
---|---|
climinf2.k | ⊢ Ⅎ𝑘𝜑 |
climinf2.n | ⊢ Ⅎ𝑘𝐹 |
climinf2.z | ⊢ 𝑍 = (ℤ≥‘𝑀) |
climinf2.m | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
climinf2.f | ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) |
climinf2.l | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘(𝑘 + 1)) ≤ (𝐹‘𝑘)) |
climinf2.e | ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝑍 𝑥 ≤ (𝐹‘𝑘)) |
Ref | Expression |
---|---|
climinf2 | ⊢ (𝜑 → 𝐹 ⇝ inf(ran 𝐹, ℝ*, < )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | climinf2.z | . 2 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
2 | climinf2.m | . 2 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
3 | climinf2.f | . 2 ⊢ (𝜑 → 𝐹:𝑍⟶ℝ) | |
4 | climinf2.k | . . . . 5 ⊢ Ⅎ𝑘𝜑 | |
5 | nfv 1922 | . . . . 5 ⊢ Ⅎ𝑘 𝑗 ∈ 𝑍 | |
6 | 4, 5 | nfan 1907 | . . . 4 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑗 ∈ 𝑍) |
7 | climinf2.n | . . . . . 6 ⊢ Ⅎ𝑘𝐹 | |
8 | nfcv 2897 | . . . . . 6 ⊢ Ⅎ𝑘(𝑗 + 1) | |
9 | 7, 8 | nffv 6705 | . . . . 5 ⊢ Ⅎ𝑘(𝐹‘(𝑗 + 1)) |
10 | nfcv 2897 | . . . . 5 ⊢ Ⅎ𝑘 ≤ | |
11 | nfcv 2897 | . . . . . 6 ⊢ Ⅎ𝑘𝑗 | |
12 | 7, 11 | nffv 6705 | . . . . 5 ⊢ Ⅎ𝑘(𝐹‘𝑗) |
13 | 9, 10, 12 | nfbr 5086 | . . . 4 ⊢ Ⅎ𝑘(𝐹‘(𝑗 + 1)) ≤ (𝐹‘𝑗) |
14 | 6, 13 | nfim 1904 | . . 3 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝐹‘(𝑗 + 1)) ≤ (𝐹‘𝑗)) |
15 | eleq1w 2813 | . . . . 5 ⊢ (𝑘 = 𝑗 → (𝑘 ∈ 𝑍 ↔ 𝑗 ∈ 𝑍)) | |
16 | 15 | anbi2d 632 | . . . 4 ⊢ (𝑘 = 𝑗 → ((𝜑 ∧ 𝑘 ∈ 𝑍) ↔ (𝜑 ∧ 𝑗 ∈ 𝑍))) |
17 | fvoveq1 7214 | . . . . 5 ⊢ (𝑘 = 𝑗 → (𝐹‘(𝑘 + 1)) = (𝐹‘(𝑗 + 1))) | |
18 | fveq2 6695 | . . . . 5 ⊢ (𝑘 = 𝑗 → (𝐹‘𝑘) = (𝐹‘𝑗)) | |
19 | 17, 18 | breq12d 5052 | . . . 4 ⊢ (𝑘 = 𝑗 → ((𝐹‘(𝑘 + 1)) ≤ (𝐹‘𝑘) ↔ (𝐹‘(𝑗 + 1)) ≤ (𝐹‘𝑗))) |
20 | 16, 19 | imbi12d 348 | . . 3 ⊢ (𝑘 = 𝑗 → (((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘(𝑘 + 1)) ≤ (𝐹‘𝑘)) ↔ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝐹‘(𝑗 + 1)) ≤ (𝐹‘𝑗)))) |
21 | climinf2.l | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘(𝑘 + 1)) ≤ (𝐹‘𝑘)) | |
22 | 14, 20, 21 | chvarfv 2240 | . 2 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝐹‘(𝑗 + 1)) ≤ (𝐹‘𝑗)) |
23 | climinf2.e | . . 3 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝑍 𝑥 ≤ (𝐹‘𝑘)) | |
24 | breq1 5042 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ≤ (𝐹‘𝑘) ↔ 𝑦 ≤ (𝐹‘𝑘))) | |
25 | 24 | ralbidv 3108 | . . . . 5 ⊢ (𝑥 = 𝑦 → (∀𝑘 ∈ 𝑍 𝑥 ≤ (𝐹‘𝑘) ↔ ∀𝑘 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑘))) |
26 | nfv 1922 | . . . . . . 7 ⊢ Ⅎ𝑗 𝑦 ≤ (𝐹‘𝑘) | |
27 | nfcv 2897 | . . . . . . . 8 ⊢ Ⅎ𝑘𝑦 | |
28 | 27, 10, 12 | nfbr 5086 | . . . . . . 7 ⊢ Ⅎ𝑘 𝑦 ≤ (𝐹‘𝑗) |
29 | 18 | breq2d 5051 | . . . . . . 7 ⊢ (𝑘 = 𝑗 → (𝑦 ≤ (𝐹‘𝑘) ↔ 𝑦 ≤ (𝐹‘𝑗))) |
30 | 26, 28, 29 | cbvralw 3339 | . . . . . 6 ⊢ (∀𝑘 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑘) ↔ ∀𝑗 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑗)) |
31 | 30 | a1i 11 | . . . . 5 ⊢ (𝑥 = 𝑦 → (∀𝑘 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑘) ↔ ∀𝑗 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑗))) |
32 | 25, 31 | bitrd 282 | . . . 4 ⊢ (𝑥 = 𝑦 → (∀𝑘 ∈ 𝑍 𝑥 ≤ (𝐹‘𝑘) ↔ ∀𝑗 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑗))) |
33 | 32 | cbvrexvw 3349 | . . 3 ⊢ (∃𝑥 ∈ ℝ ∀𝑘 ∈ 𝑍 𝑥 ≤ (𝐹‘𝑘) ↔ ∃𝑦 ∈ ℝ ∀𝑗 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑗)) |
34 | 23, 33 | sylib 221 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑗 ∈ 𝑍 𝑦 ≤ (𝐹‘𝑗)) |
35 | 1, 2, 3, 22, 34 | climinf2lem 42865 | 1 ⊢ (𝜑 → 𝐹 ⇝ inf(ran 𝐹, ℝ*, < )) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1543 Ⅎwnf 1791 ∈ wcel 2112 Ⅎwnfc 2877 ∀wral 3051 ∃wrex 3052 class class class wbr 5039 ran crn 5537 ⟶wf 6354 ‘cfv 6358 (class class class)co 7191 infcinf 9035 ℝcr 10693 1c1 10695 + caddc 10697 ℝ*cxr 10831 < clt 10832 ≤ cle 10833 ℤcz 12141 ℤ≥cuz 12403 ⇝ cli 15010 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 ax-pre-sup 10772 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 df-sup 9036 df-inf 9037 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-div 11455 df-nn 11796 df-2 11858 df-3 11859 df-n0 12056 df-z 12142 df-uz 12404 df-rp 12552 df-fz 13061 df-seq 13540 df-exp 13601 df-cj 14627 df-re 14628 df-im 14629 df-sqrt 14763 df-abs 14764 df-clim 15014 |
This theorem is referenced by: climinf2mpt 42873 climinfmpt 42874 climinf3 42875 |
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