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| Mirrors > Home > MPE Home > Th. List > cxpef | Structured version Visualization version GIF version | ||
| Description: Value of the complex power function. (Contributed by Mario Carneiro, 2-Aug-2014.) |
| Ref | Expression |
|---|---|
| cxpef | ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cxpval 27025 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = if(𝐴 = 0, if(𝐵 = 0, 1, 0), (exp‘(𝐵 · (log‘𝐴))))) | |
| 2 | 1 | 3adant2 1149 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = if(𝐴 = 0, if(𝐵 = 0, 1, 0), (exp‘(𝐵 · (log‘𝐴))))) |
| 3 | simp2 1155 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → 𝐴 ≠ 0) | |
| 4 | 3 | neneqd 2964 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → ¬ 𝐴 = 0) |
| 5 | 4 | iffalsed 4496 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → if(𝐴 = 0, if(𝐵 = 0, 1, 0), (exp‘(𝐵 · (log‘𝐴)))) = (exp‘(𝐵 · (log‘𝐴)))) |
| 6 | 2, 5 | eqtrd 2798 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴)))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ifcif 4485 ‘cfv 6561 (class class class)co 7446 ℂcc 11228 0cc0 11230 1c1 11231 · cmul 11235 expce 16259 logclog 26915 ↑𝑐ccxp 26916 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pr 5396 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-mulcl 11292 ax-i2m1 11298 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-opab 5172 df-id 5551 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-iota 6515 df-fun 6563 df-fv 6569 df-ov 7449 df-oprab 7450 df-mpo 7451 df-cxp 26918 |
| This theorem is used by: cxpexpz 27028 logcxp 27030 1cxp 27033 ecxp 27034 rpcxpcl 27037 cxpne0 27038 cxpadd 27040 mulcxp 27046 cxpmul 27049 abscxp 27053 abscxp2 27054 cxplt 27055 cxple2 27058 cxpsqrtlem 27063 cxpsqrt 27064 cxpefd 27073 1cubrlem 27202 bposlem9 27652 iexpire 36691 aks4d1p1p1 43316 |
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