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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 26601 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = if(𝐴 = 0, if(𝐵 = 0, 1, 0), (exp‘(𝐵 · (log‘𝐴))))) | |
| 2 | 1 | 3adant2 1131 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = if(𝐴 = 0, if(𝐵 = 0, 1, 0), (exp‘(𝐵 · (log‘𝐴))))) |
| 3 | simp2 1137 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → 𝐴 ≠ 0) | |
| 4 | 3 | neneqd 2933 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → ¬ 𝐴 = 0) |
| 5 | 4 | iffalsed 4486 | . 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 2766 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ∧ 𝐵 ∈ ℂ) → (𝐴↑𝑐𝐵) = (exp‘(𝐵 · (log‘𝐴)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1541 ∈ wcel 2111 ≠ wne 2928 ifcif 4475 ‘cfv 6481 (class class class)co 7346 ℂcc 11004 0cc0 11006 1c1 11007 · cmul 11011 expce 15968 logclog 26491 ↑𝑐ccxp 26492 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pr 5370 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-mulcl 11068 ax-i2m1 11074 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-sbc 3742 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4284 df-if 4476 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-id 5511 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-iota 6437 df-fun 6483 df-fv 6489 df-ov 7349 df-oprab 7350 df-mpo 7351 df-cxp 26494 |
| This theorem is referenced by: cxpexpz 26604 logcxp 26606 1cxp 26609 ecxp 26610 rpcxpcl 26613 cxpne0 26614 cxpadd 26616 mulcxp 26622 cxpmul 26625 abscxp 26629 abscxp2 26630 cxplt 26631 cxple2 26634 cxpsqrtlem 26639 cxpsqrt 26640 cxpefd 26649 1cubrlem 26779 bposlem9 27231 iexpire 35777 aks4d1p1p1 42102 |
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