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| Mirrors > Home > MPE Home > Th. List > exp11nnd | Structured version Visualization version GIF version | ||
| Description: The function elevating nonnegative reals to a positive integer is one-to-one. Similar to sq11d 14285 for positive real bases and positive integer exponents. The base cannot be generalized much further, since if 𝑁 is even then we have 𝐴↑𝑁 = -𝐴↑𝑁. (Contributed by SN, 14-Sep-2023.) |
| Ref | Expression |
|---|---|
| exp11nnd.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ+) |
| exp11nnd.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ+) |
| exp11nnd.3 | ⊢ (𝜑 → 𝑁 ∈ ℕ) |
| exp11nnd.4 | ⊢ (𝜑 → (𝐴↑𝑁) = (𝐵↑𝑁)) |
| Ref | Expression |
|---|---|
| exp11nnd | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | exp11nnd.4 | . . . 4 ⊢ (𝜑 → (𝐴↑𝑁) = (𝐵↑𝑁)) | |
| 2 | exp11nnd.1 | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℝ+) | |
| 3 | 2 | rpred 13051 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 4 | exp11nnd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℕ) | |
| 5 | 4 | nnnn0d 12556 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| 6 | 3, 5 | reexpcld 14190 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℝ) |
| 7 | exp11nnd.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 8 | 7 | rpred 13051 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 9 | 8, 5 | reexpcld 14190 | . . . . 5 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℝ) |
| 10 | 6, 9 | lttri3d 11338 | . . . 4 ⊢ (𝜑 → ((𝐴↑𝑁) = (𝐵↑𝑁) ↔ (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁)))) |
| 11 | 1, 10 | mpbid 235 | . . 3 ⊢ (𝜑 → (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 12 | 2, 7, 4 | ltexp1d 14286 | . . . . 5 ⊢ (𝜑 → (𝐴 < 𝐵 ↔ (𝐴↑𝑁) < (𝐵↑𝑁))) |
| 13 | 12 | notbid 321 | . . . 4 ⊢ (𝜑 → (¬ 𝐴 < 𝐵 ↔ ¬ (𝐴↑𝑁) < (𝐵↑𝑁))) |
| 14 | 7, 2, 4 | ltexp1d 14286 | . . . . 5 ⊢ (𝜑 → (𝐵 < 𝐴 ↔ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 15 | 14 | notbid 321 | . . . 4 ⊢ (𝜑 → (¬ 𝐵 < 𝐴 ↔ ¬ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 16 | 13, 15 | anbi12d 643 | . . 3 ⊢ (𝜑 → ((¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴) ↔ (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁)))) |
| 17 | 11, 16 | mpbird 260 | . 2 ⊢ (𝜑 → (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴)) |
| 18 | 3, 8 | lttri3d 11338 | . 2 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) |
| 19 | 17, 18 | mpbird 260 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 class class class wbr 5105 (class class class)co 7400 < clt 11231 ℕcn 12224 ℝ+crp 13007 ↑cexp 14088 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5547 df-eprel 5552 df-po 5560 df-so 5561 df-fr 5605 df-we 5607 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6292 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-nn 12225 df-n0 12496 df-z 12583 df-uz 12854 df-rp 13008 df-seq 14029 df-exp 14089 |
| This theorem is referenced by: zrtelqelz 26881 expeq1d 42945 exp11d 42947 dvdsexpnn 42954 fltne 43238 |
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