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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 14314 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 13078 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 4 | exp11nnd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℕ) | |
| 5 | 4 | nnnn0d 12583 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| 6 | 3, 5 | reexpcld 14219 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℝ) |
| 7 | exp11nnd.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 8 | 7 | rpred 13078 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 9 | 8, 5 | reexpcld 14219 | . . . . 5 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℝ) |
| 10 | 6, 9 | lttri3d 11368 | . . . 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 14315 | . . . . 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 14315 | . . . . 5 ⊢ (𝜑 → (𝐵 < 𝐴 ↔ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 15 | 14 | notbid 321 | . . . 4 ⊢ (𝜑 → (¬ 𝐵 < 𝐴 ↔ ¬ (𝐵↑𝑁) < (𝐴↑𝑁))) |
| 16 | 13, 15 | anbi12d 644 | . . 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 11368 | . 2 ⊢ (𝜑 → (𝐴 = 𝐵 ↔ (¬ 𝐴 < 𝐵 ∧ ¬ 𝐵 < 𝐴))) |
| 19 | 17, 18 | mpbird 260 | 1 ⊢ (𝜑 → 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 class class class wbr 5114 (class class class)co 7423 < clt 11261 ℕcn 12251 ℝ+crp 13034 ↑cexp 14117 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-nn 12252 df-n0 12523 df-z 12610 df-uz 12881 df-rp 13035 df-seq 14058 df-exp 14118 |
| This theorem is used by: zrtelqelz 26953 expeq1d 43118 exp11d 43120 dvdsexpnn 43127 fltne 43409 |
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