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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 14325 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 13089 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℝ) |
| 4 | exp11nnd.3 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℕ) | |
| 5 | 4 | nnnn0d 12592 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| 6 | 3, 5 | reexpcld 14230 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℝ) |
| 7 | exp11nnd.2 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ+) | |
| 8 | 7 | rpred 13089 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| 9 | 8, 5 | reexpcld 14230 | . . . . 5 ⊢ (𝜑 → (𝐵↑𝑁) ∈ ℝ) |
| 10 | 6, 9 | lttri3d 11377 | . . . 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 14326 | . . . . 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 14326 | . . . . 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 11377 | . 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 2145 class class class wbr 5103 (class class class)co 7414 < clt 11270 ℕcn 12260 ℝ+crp 13045 ↑cexp 14128 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 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 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-n0 12532 df-z 12619 df-uz 12891 df-rp 13046 df-seq 14069 df-exp 14129 |
| This theorem is used by: zrtelqelz 26998 expeq1d 43202 exp11d 43204 dvdsexpnn 43211 fltne 43493 |
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