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Mirrors > Home > ILE Home > Th. List > leexp2a | 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 987 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℝ) | |
2 | 0red 7900 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 ∈ ℝ) | |
3 | 1red 7914 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ∈ ℝ) | |
4 | 0lt1 8025 | . . . . . . . . 9 ⊢ 0 < 1 | |
5 | 4 | a1i 9 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 < 1) |
6 | simp2 988 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ 𝐴) | |
7 | 2, 3, 1, 5, 6 | ltletrd 8321 | . . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 0 < 𝐴) |
8 | 1, 7 | elrpd 9629 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℝ+) |
9 | eluzel2 9471 | . . . . . . 7 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ) | |
10 | 9 | 3ad2ant3 1010 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝑀 ∈ ℤ) |
11 | rpexpcl 10474 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝑀 ∈ ℤ) → (𝐴↑𝑀) ∈ ℝ+) | |
12 | 8, 10, 11 | syl2anc 409 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℝ+) |
13 | 12 | rpred 9632 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℝ) |
14 | 13 | recnd 7927 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ∈ ℂ) |
15 | 14 | mulid2d 7917 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (1 · (𝐴↑𝑀)) = (𝐴↑𝑀)) |
16 | uznn0sub 9497 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 𝑀) ∈ ℕ0) | |
17 | 16 | 3ad2ant3 1010 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝑁 − 𝑀) ∈ ℕ0) |
18 | expge1 10492 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ (𝑁 − 𝑀) ∈ ℕ0 ∧ 1 ≤ 𝐴) → 1 ≤ (𝐴↑(𝑁 − 𝑀))) | |
19 | 1, 17, 6, 18 | syl3anc 1228 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ (𝐴↑(𝑁 − 𝑀))) |
20 | 1 | recnd 7927 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 ∈ ℂ) |
21 | 1, 7 | gt0ap0d 8527 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝐴 # 0) |
22 | eluzelz 9475 | . . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
23 | 22 | 3ad2ant3 1010 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝑁 ∈ ℤ) |
24 | expsubap 10503 | . . . . 5 ⊢ (((𝐴 ∈ ℂ ∧ 𝐴 # 0) ∧ (𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ)) → (𝐴↑(𝑁 − 𝑀)) = ((𝐴↑𝑁) / (𝐴↑𝑀))) | |
25 | 20, 21, 23, 10, 24 | syl22anc 1229 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑(𝑁 − 𝑀)) = ((𝐴↑𝑁) / (𝐴↑𝑀))) |
26 | 19, 25 | breqtrd 4008 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 1 ≤ ((𝐴↑𝑁) / (𝐴↑𝑀))) |
27 | rpexpcl 10474 | . . . . . 6 ⊢ ((𝐴 ∈ ℝ+ ∧ 𝑁 ∈ ℤ) → (𝐴↑𝑁) ∈ ℝ+) | |
28 | 8, 23, 27 | syl2anc 409 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑁) ∈ ℝ+) |
29 | 28 | rpred 9632 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑁) ∈ ℝ) |
30 | 3, 29, 12 | lemuldivd 9682 | . . 3 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → ((1 · (𝐴↑𝑀)) ≤ (𝐴↑𝑁) ↔ 1 ≤ ((𝐴↑𝑁) / (𝐴↑𝑀)))) |
31 | 26, 30 | mpbird 166 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (1 · (𝐴↑𝑀)) ≤ (𝐴↑𝑁)) |
32 | 15, 31 | eqbrtrrd 4006 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 1 ≤ 𝐴 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (𝐴↑𝑀) ≤ (𝐴↑𝑁)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 class class class wbr 3982 ‘cfv 5188 (class class class)co 5842 ℂcc 7751 ℝcr 7752 0cc0 7753 1c1 7754 · cmul 7758 < clt 7933 ≤ cle 7934 − cmin 8069 # cap 8479 / cdiv 8568 ℕ0cn0 9114 ℤcz 9191 ℤ≥cuz 9466 ℝ+crp 9589 ↑cexp 10454 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 |
This theorem depends on definitions: df-bi 116 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-frec 6359 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-n0 9115 df-z 9192 df-uz 9467 df-rp 9590 df-seqfrec 10381 df-exp 10455 |
This theorem is referenced by: expnlbnd2 10580 leexp2ad 10617 ef01bndlem 11697 |
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