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Mirrors > Home > MPE Home > Th. List > log2ublem1 | Structured version Visualization version GIF version |
Description: Lemma for log2ub 24476. The proof of log2ub 24476, which is simply the evaluation of log2tlbnd 24472 for 𝑁 = 4, takes the form of the addition of five fractions and showing this is less than another fraction. We could just perform exact arithmetic on these fractions, get a large rational number, and just multiply everything to verify the claim, but as anyone who uses decimal numbers for this task knows, it is often better to pick a common denominator 𝑑 (usually a large power of 10) and work with the closest approximations of the form 𝑛 / 𝑑 for some integer 𝑛 instead. It turns out that for our purposes it is sufficient to take 𝑑 = (3↑7) · 5 · 7, which is also nice because it shares many factors in common with the fractions in question. (Contributed by Mario Carneiro, 17-Apr-2015.) |
Ref | Expression |
---|---|
log2ublem1.1 | ⊢ (((3↑7) · (5 · 7)) · 𝐴) ≤ 𝐵 |
log2ublem1.2 | ⊢ 𝐴 ∈ ℝ |
log2ublem1.3 | ⊢ 𝐷 ∈ ℕ0 |
log2ublem1.4 | ⊢ 𝐸 ∈ ℕ |
log2ublem1.5 | ⊢ 𝐵 ∈ ℕ0 |
log2ublem1.6 | ⊢ 𝐹 ∈ ℕ0 |
log2ublem1.7 | ⊢ 𝐶 = (𝐴 + (𝐷 / 𝐸)) |
log2ublem1.8 | ⊢ (𝐵 + 𝐹) = 𝐺 |
log2ublem1.9 | ⊢ (((3↑7) · (5 · 7)) · 𝐷) ≤ (𝐸 · 𝐹) |
Ref | Expression |
---|---|
log2ublem1 | ⊢ (((3↑7) · (5 · 7)) · 𝐶) ≤ 𝐺 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | log2ublem1.1 | . . 3 ⊢ (((3↑7) · (5 · 7)) · 𝐴) ≤ 𝐵 | |
2 | 3nn 11063 | . . . . . . . 8 ⊢ 3 ∈ ℕ | |
3 | 7nn0 11191 | . . . . . . . 8 ⊢ 7 ∈ ℕ0 | |
4 | nnexpcl 12735 | . . . . . . . 8 ⊢ ((3 ∈ ℕ ∧ 7 ∈ ℕ0) → (3↑7) ∈ ℕ) | |
5 | 2, 3, 4 | mp2an 704 | . . . . . . 7 ⊢ (3↑7) ∈ ℕ |
6 | 5nn 11065 | . . . . . . . 8 ⊢ 5 ∈ ℕ | |
7 | 7nn 11067 | . . . . . . . 8 ⊢ 7 ∈ ℕ | |
8 | 6, 7 | nnmulcli 10921 | . . . . . . 7 ⊢ (5 · 7) ∈ ℕ |
9 | 5, 8 | nnmulcli 10921 | . . . . . 6 ⊢ ((3↑7) · (5 · 7)) ∈ ℕ |
10 | 9 | nncni 10907 | . . . . 5 ⊢ ((3↑7) · (5 · 7)) ∈ ℂ |
11 | log2ublem1.3 | . . . . . 6 ⊢ 𝐷 ∈ ℕ0 | |
12 | 11 | nn0cni 11181 | . . . . 5 ⊢ 𝐷 ∈ ℂ |
13 | log2ublem1.4 | . . . . . 6 ⊢ 𝐸 ∈ ℕ | |
14 | 13 | nncni 10907 | . . . . 5 ⊢ 𝐸 ∈ ℂ |
15 | 13 | nnne0i 10932 | . . . . 5 ⊢ 𝐸 ≠ 0 |
16 | 10, 12, 14, 15 | divassi 10660 | . . . 4 ⊢ ((((3↑7) · (5 · 7)) · 𝐷) / 𝐸) = (((3↑7) · (5 · 7)) · (𝐷 / 𝐸)) |
17 | log2ublem1.9 | . . . . 5 ⊢ (((3↑7) · (5 · 7)) · 𝐷) ≤ (𝐸 · 𝐹) | |
18 | 3nn0 11187 | . . . . . . . . . 10 ⊢ 3 ∈ ℕ0 | |
19 | 18, 3 | nn0expcli 12748 | . . . . . . . . 9 ⊢ (3↑7) ∈ ℕ0 |
20 | 5nn0 11189 | . . . . . . . . . 10 ⊢ 5 ∈ ℕ0 | |
21 | 20, 3 | nn0mulcli 11208 | . . . . . . . . 9 ⊢ (5 · 7) ∈ ℕ0 |
22 | 19, 21 | nn0mulcli 11208 | . . . . . . . 8 ⊢ ((3↑7) · (5 · 7)) ∈ ℕ0 |
23 | 22, 11 | nn0mulcli 11208 | . . . . . . 7 ⊢ (((3↑7) · (5 · 7)) · 𝐷) ∈ ℕ0 |
24 | 23 | nn0rei 11180 | . . . . . 6 ⊢ (((3↑7) · (5 · 7)) · 𝐷) ∈ ℝ |
25 | log2ublem1.6 | . . . . . . 7 ⊢ 𝐹 ∈ ℕ0 | |
26 | 25 | nn0rei 11180 | . . . . . 6 ⊢ 𝐹 ∈ ℝ |
27 | 13 | nnrei 10906 | . . . . . . 7 ⊢ 𝐸 ∈ ℝ |
28 | 13 | nngt0i 10931 | . . . . . . 7 ⊢ 0 < 𝐸 |
29 | 27, 28 | pm3.2i 470 | . . . . . 6 ⊢ (𝐸 ∈ ℝ ∧ 0 < 𝐸) |
30 | ledivmul 10778 | . . . . . 6 ⊢ (((((3↑7) · (5 · 7)) · 𝐷) ∈ ℝ ∧ 𝐹 ∈ ℝ ∧ (𝐸 ∈ ℝ ∧ 0 < 𝐸)) → (((((3↑7) · (5 · 7)) · 𝐷) / 𝐸) ≤ 𝐹 ↔ (((3↑7) · (5 · 7)) · 𝐷) ≤ (𝐸 · 𝐹))) | |
31 | 24, 26, 29, 30 | mp3an 1416 | . . . . 5 ⊢ (((((3↑7) · (5 · 7)) · 𝐷) / 𝐸) ≤ 𝐹 ↔ (((3↑7) · (5 · 7)) · 𝐷) ≤ (𝐸 · 𝐹)) |
32 | 17, 31 | mpbir 220 | . . . 4 ⊢ ((((3↑7) · (5 · 7)) · 𝐷) / 𝐸) ≤ 𝐹 |
33 | 16, 32 | eqbrtrri 4606 | . . 3 ⊢ (((3↑7) · (5 · 7)) · (𝐷 / 𝐸)) ≤ 𝐹 |
34 | 9 | nnrei 10906 | . . . . 5 ⊢ ((3↑7) · (5 · 7)) ∈ ℝ |
35 | log2ublem1.2 | . . . . 5 ⊢ 𝐴 ∈ ℝ | |
36 | 34, 35 | remulcli 9933 | . . . 4 ⊢ (((3↑7) · (5 · 7)) · 𝐴) ∈ ℝ |
37 | 11 | nn0rei 11180 | . . . . . 6 ⊢ 𝐷 ∈ ℝ |
38 | nndivre 10933 | . . . . . 6 ⊢ ((𝐷 ∈ ℝ ∧ 𝐸 ∈ ℕ) → (𝐷 / 𝐸) ∈ ℝ) | |
39 | 37, 13, 38 | mp2an 704 | . . . . 5 ⊢ (𝐷 / 𝐸) ∈ ℝ |
40 | 34, 39 | remulcli 9933 | . . . 4 ⊢ (((3↑7) · (5 · 7)) · (𝐷 / 𝐸)) ∈ ℝ |
41 | log2ublem1.5 | . . . . 5 ⊢ 𝐵 ∈ ℕ0 | |
42 | 41 | nn0rei 11180 | . . . 4 ⊢ 𝐵 ∈ ℝ |
43 | 36, 40, 42, 26 | le2addi 10470 | . . 3 ⊢ (((((3↑7) · (5 · 7)) · 𝐴) ≤ 𝐵 ∧ (((3↑7) · (5 · 7)) · (𝐷 / 𝐸)) ≤ 𝐹) → ((((3↑7) · (5 · 7)) · 𝐴) + (((3↑7) · (5 · 7)) · (𝐷 / 𝐸))) ≤ (𝐵 + 𝐹)) |
44 | 1, 33, 43 | mp2an 704 | . 2 ⊢ ((((3↑7) · (5 · 7)) · 𝐴) + (((3↑7) · (5 · 7)) · (𝐷 / 𝐸))) ≤ (𝐵 + 𝐹) |
45 | log2ublem1.7 | . . . 4 ⊢ 𝐶 = (𝐴 + (𝐷 / 𝐸)) | |
46 | 45 | oveq2i 6560 | . . 3 ⊢ (((3↑7) · (5 · 7)) · 𝐶) = (((3↑7) · (5 · 7)) · (𝐴 + (𝐷 / 𝐸))) |
47 | 35 | recni 9931 | . . . 4 ⊢ 𝐴 ∈ ℂ |
48 | 39 | recni 9931 | . . . 4 ⊢ (𝐷 / 𝐸) ∈ ℂ |
49 | 10, 47, 48 | adddii 9929 | . . 3 ⊢ (((3↑7) · (5 · 7)) · (𝐴 + (𝐷 / 𝐸))) = ((((3↑7) · (5 · 7)) · 𝐴) + (((3↑7) · (5 · 7)) · (𝐷 / 𝐸))) |
50 | 46, 49 | eqtr2i 2633 | . 2 ⊢ ((((3↑7) · (5 · 7)) · 𝐴) + (((3↑7) · (5 · 7)) · (𝐷 / 𝐸))) = (((3↑7) · (5 · 7)) · 𝐶) |
51 | log2ublem1.8 | . 2 ⊢ (𝐵 + 𝐹) = 𝐺 | |
52 | 44, 50, 51 | 3brtr3i 4612 | 1 ⊢ (((3↑7) · (5 · 7)) · 𝐶) ≤ 𝐺 |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 195 ∧ wa 383 = wceq 1475 ∈ wcel 1977 class class class wbr 4583 (class class class)co 6549 ℝcr 9814 0cc0 9815 + caddc 9818 · cmul 9820 < clt 9953 ≤ cle 9954 / cdiv 10563 ℕcn 10897 3c3 10948 5c5 10950 7c7 10952 ℕ0cn0 11169 ↑cexp 12722 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-n0 11170 df-z 11255 df-uz 11564 df-seq 12664 df-exp 12723 |
This theorem is referenced by: log2ublem2 24474 log2ub 24476 |
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