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| Mirrors > Home > MPE Home > Th. List > leexp2 | Structured version Visualization version GIF version | ||
| Description: Ordering law for exponentiation of a fixed real base greater than 1 to integer exponents. (Contributed by Mario Carneiro, 26-Apr-2016.) |
| Ref | Expression |
|---|---|
| leexp2 | ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝑀 ≤ 𝑁 ↔ (𝐴↑𝑀) ≤ (𝐴↑𝑁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3ancomb 1116 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ↔ (𝐴 ∈ ℝ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ)) | |
| 2 | ltexp2 14306 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ∈ ℤ) ∧ 1 < 𝐴) → (𝑁 < 𝑀 ↔ (𝐴↑𝑁) < (𝐴↑𝑀))) | |
| 3 | 1, 2 | sylanb 593 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝑁 < 𝑀 ↔ (𝐴↑𝑁) < (𝐴↑𝑀))) |
| 4 | 3 | notbid 321 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (¬ 𝑁 < 𝑀 ↔ ¬ (𝐴↑𝑁) < (𝐴↑𝑀))) |
| 5 | simpl2 1211 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 𝑀 ∈ ℤ) | |
| 6 | simpl3 1212 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 𝑁 ∈ ℤ) | |
| 7 | zre 12690 | . . . 4 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
| 8 | zre 12690 | . . . 4 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ ℝ) | |
| 9 | lenlt 11381 | . . . 4 ⊢ ((𝑀 ∈ ℝ ∧ 𝑁 ∈ ℝ) → (𝑀 ≤ 𝑁 ↔ ¬ 𝑁 < 𝑀)) | |
| 10 | 7, 8, 9 | syl2an 608 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ≤ 𝑁 ↔ ¬ 𝑁 < 𝑀)) |
| 11 | 5, 6, 10 | syl2anc 596 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝑀 ≤ 𝑁 ↔ ¬ 𝑁 < 𝑀)) |
| 12 | simpl1 1210 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 𝐴 ∈ ℝ) | |
| 13 | 0red 11304 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 0 ∈ ℝ) | |
| 14 | 1red 11302 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 1 ∈ ℝ) | |
| 15 | 0lt1 11831 | . . . . . . 7 ⊢ 0 < 1 | |
| 16 | 15 | a1i 11 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 0 < 1) |
| 17 | simpr 490 | . . . . . 6 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 1 < 𝐴) | |
| 18 | 13, 14, 12, 16, 17 | lttrd 11464 | . . . . 5 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 0 < 𝐴) |
| 19 | 18 | gt0ne0d 11873 | . . . 4 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → 𝐴 ≠ 0) |
| 20 | reexpclz 14218 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0 ∧ 𝑀 ∈ ℤ) → (𝐴↑𝑀) ∈ ℝ) | |
| 21 | 12, 19, 5, 20 | syl3anc 1398 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝐴↑𝑀) ∈ ℝ) |
| 22 | reexpclz 14218 | . . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐴 ≠ 0 ∧ 𝑁 ∈ ℤ) → (𝐴↑𝑁) ∈ ℝ) | |
| 23 | 12, 19, 6, 22 | syl3anc 1398 | . . 3 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝐴↑𝑁) ∈ ℝ) |
| 24 | 21, 23 | lenltd 11449 | . 2 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → ((𝐴↑𝑀) ≤ (𝐴↑𝑁) ↔ ¬ (𝐴↑𝑁) < (𝐴↑𝑀))) |
| 25 | 4, 11, 24 | 3bitr4d 314 | 1 ⊢ (((𝐴 ∈ ℝ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ 1 < 𝐴) → (𝑀 ≤ 𝑁 ↔ (𝐴↑𝑀) ≤ (𝐴↑𝑁))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2145 ≠ wne 2956 class class class wbr 5103 (class class class)co 7418 ℝcr 11192 0cc0 11193 1c1 11194 < clt 11336 ≤ cle 11337 ℤcz 12686 ↑cexp 14197 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 df-nn 12329 df-n0 12600 df-z 12687 df-uz 12959 df-rp 13114 df-seq 14138 df-exp 14198 |
| This theorem is used by: leexp2d 14389 hgt750leme 35280 |
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