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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 14220 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 12986 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 4 | exp11nnd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℕ) | |
| 5 | 4 | nnnn0d 12498 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| 6 | 3, 5 | reexpcld 14125 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℝ) |
| 7 | exp11nnd.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 8 | 7 | rpred 12986 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 9 | 8, 5 | reexpcld 14125 | . . . . 5 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℝ) |
| 10 | 6, 9 | lttri3d 11286 | . . . 4 ⊢ (𝜑 → ((𝐴↑𝑁) = (𝐵↑𝑁) ↔ (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁)))) |
| 11 | 1, 10 | mpbid 232 | . . 3 ⊢ (𝜑 → (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 12 | 2, 7, 4 | ltexp1d 14221 | . . . . 5 ⊢ (𝜑 → (𝐴 < 𝐵 ↔ (𝐴↑𝑁) < (𝐵↑𝑁))) |
| 13 | 12 | notbid 318 | . . . 4 ⊢ (𝜑 → (¬ 𝐴 < 𝐵 ↔ ¬ (𝐴↑𝑁) < (𝐵↑𝑁))) |
| 14 | 7, 2, 4 | ltexp1d 14221 | . . . . 5 ⊢ (𝜑 → (𝐵 < 𝐴 ↔ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 15 | 14 | notbid 318 | . . . 4 ⊢ (𝜑 → (¬ 𝐵 < 𝐴 ↔ ¬ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 16 | 13, 15 | anbi12d 633 | . . 3 ⊢ (𝜑 → ((¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴) ↔ (¬ (𝐴↑𝑁) < (𝐵↑𝑁) ∧ ¬ (𝐵↑𝑁) < (𝐴↑𝑁)))) |
| 17 | 11, 16 | mpbird 257 | . 2 ⊢ (𝜑 → (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴)) |
| 18 | 3, 8 | lttri3d 11286 | . 2 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) |
| 19 | 17, 18 | mpbird 257 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5086 (class class class)co 7367 < clt 11179 ℕcn 12174 ℝ+crp 12942 ↑cexp 14023 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6266 df-ord 6327 df-on 6328 df-lim 6329 df-suc 6330 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-n0 12438 df-z 12525 df-uz 12789 df-rp 12943 df-seq 13964 df-exp 14024 |
| This theorem is referenced by: zrtelqelz 26722 expeq1d 42756 exp11d 42758 dvdsexpnn 42765 fltne 43077 |
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