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Mirrors > Home > MPE Home > Th. List > leexp2a | Structured version Visualization version GIF version |
Description: Weak ordering relationship for exponentiation. (Contributed by NM, 14-Dec-2005.) (Revised by Mario Carneiro, 5-Jun-2014.) |
Ref | Expression |
---|---|
leexp2a | ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ≤ (𝐴↑𝑁)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1134 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℝ) | |
2 | 0red 10909 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 ∈ ℝ) | |
3 | 1red 10907 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ∈ ℝ) | |
4 | 0lt1 11427 | . . . . . . . . 9 ⊢ 0 < 1 | |
5 | 4 | a1i 11 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 < 1) |
6 | simp2 1135 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ 𝐴) | |
7 | 2, 3, 1, 5, 6 | ltletrd 11065 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 < 𝐴) |
8 | 1, 7 | elrpd 12698 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℝ+) |
9 | eluzel2 12516 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
10 | 9 | 3ad2ant3 1133 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝑀 ∈ ℤ) |
11 | rpexpcl 13729 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝑀 ∈ ℤ) → (𝐴↑𝑀) ∈ ℝ+) | |
12 | 8, 10, 11 | syl2anc 583 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℝ+) |
13 | 12 | rpred 12701 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℝ) |
14 | 13 | recnd 10934 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℂ) |
15 | 14 | mulid2d 10924 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (1 · (𝐴↑𝑀)) = (𝐴↑𝑀)) |
16 | uznn0sub 12546 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 𝑀) ∈ ℕ0) | |
17 | 16 | 3ad2ant3 1133 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝑁 − 𝑀) ∈ ℕ0) |
18 | expge1 13748 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ (𝑁 − 𝑀) ∈ ℕ0 ∧ 1 ≤ 𝐴) → 1 ≤ (𝐴↑(𝑁 − 𝑀))) | |
19 | 1, 17, 6, 18 | syl3anc 1369 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ (𝐴↑(𝑁 − 𝑀))) |
20 | 1 | recnd 10934 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℂ) |
21 | 7 | gt0ne0d 11469 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ≠ 0) |
22 | eluzelz 12521 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
23 | 22 | 3ad2ant3 1133 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝑁 ∈ ℤ) |
24 | expsub 13759 | . . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) ∧ (𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ)) → (𝐴↑(𝑁 − 𝑀)) = ((𝐴↑𝑁) / (𝐴↑𝑀))) | |
25 | 20, 21, 23, 10, 24 | syl22anc 835 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑(𝑁 − 𝑀)) = ((𝐴↑𝑁) / (𝐴↑𝑀))) |
26 | 19, 25 | breqtrd 5096 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ ((𝐴↑𝑁) / (𝐴↑𝑀))) |
27 | rpexpcl 13729 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝑁 ∈ ℤ) → (𝐴↑𝑁) ∈ ℝ+) | |
28 | 8, 23, 27 | syl2anc 583 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑁) ∈ ℝ+) |
29 | 28 | rpred 12701 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑁) ∈ ℝ) |
30 | 3, 29, 12 | lemuldivd 12750 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → ((1 · (𝐴↑𝑀)) ≤ (𝐴↑𝑁) ↔ 1 ≤ ((𝐴↑𝑁) / (𝐴↑𝑀)))) |
31 | 26, 30 | mpbird 256 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (1 · (𝐴↑𝑀)) ≤ (𝐴↑𝑁)) |
32 | 15, 31 | eqbrtrrd 5094 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ≤ (𝐴↑𝑁)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 class class class wbr 5070 ‘cfv 6418 (class class class)co 7255 ℂcc 10800 ℝcr 10801 0cc0 10802 1c1 10803 · cmul 10807 < clt 10940 ≤ cle 10941 − cmin 11135 / cdiv 11562 ℕ0cn0 12163 ℤcz 12249 ℤ≥cuz 12511 ℝ+crp 12659 ↑cexp 13710 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-seq 13650 df-exp 13711 |
This theorem is referenced by: expnlbnd2 13877 digit1 13880 leexp2ad 13899 faclbnd4lem1 13935 climcndslem1 15489 climcndslem2 15490 ef01bndlem 15821 aaliou3lem2 25408 ackval42 45930 |
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