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Mirrors > Home > MPE Home > Th. List > atandm | Structured version Visualization version GIF version |
Description: Since the property is a little lengthy, we abbreviate 𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i as 𝐴 ∈ dom arctan. This is the necessary precondition for the definition of arctan to make sense. (Contributed by Mario Carneiro, 31-Mar-2015.) |
Ref | Expression |
---|---|
atandm | ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3897 | . . 3 ⊢ (𝐴 ∈ (ℂ ∖ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ {-i, i})) | |
2 | elprg 4582 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴 ∈ {-i, i} ↔ (𝐴 = -i ∨ 𝐴 = i))) | |
3 | 2 | notbid 318 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (¬ 𝐴 ∈ {-i, i} ↔ ¬ (𝐴 = -i ∨ 𝐴 = i))) |
4 | neanior 3037 | . . . . 5 ⊢ ((𝐴 ≠ -i ∧ 𝐴 ≠ i) ↔ ¬ (𝐴 = -i ∨ 𝐴 = i)) | |
5 | 3, 4 | bitr4di 289 | . . . 4 ⊢ (𝐴 ∈ ℂ → (¬ 𝐴 ∈ {-i, i} ↔ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
6 | 5 | pm5.32i 575 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
7 | 1, 6 | bitri 274 | . 2 ⊢ (𝐴 ∈ (ℂ ∖ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
8 | ovex 7308 | . . . 4 ⊢ ((i / 2) · ((log‘(1 − (i · 𝑥))) − (log‘(1 + (i · 𝑥))))) ∈ V | |
9 | df-atan 26017 | . . . 4 ⊢ arctan = (𝑥 ∈ (ℂ ∖ {-i, i}) ↦ ((i / 2) · ((log‘(1 − (i · 𝑥))) − (log‘(1 + (i · 𝑥)))))) | |
10 | 8, 9 | dmmpti 6577 | . . 3 ⊢ dom arctan = (ℂ ∖ {-i, i}) |
11 | 10 | eleq2i 2830 | . 2 ⊢ (𝐴 ∈ dom arctan ↔ 𝐴 ∈ (ℂ ∖ {-i, i})) |
12 | 3anass 1094 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) | |
13 | 7, 11, 12 | 3bitr4i 303 | 1 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 205 ∧ wa 396 ∨ wo 844 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∖ cdif 3884 {cpr 4563 dom cdm 5589 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 1c1 10872 ici 10873 + caddc 10874 · cmul 10876 − cmin 11205 -cneg 11206 / cdiv 11632 2c2 12028 logclog 25710 arctancatan 26014 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-iota 6391 df-fun 6435 df-fn 6436 df-fv 6441 df-ov 7278 df-atan 26017 |
This theorem is referenced by: atandm2 26027 atandm3 26028 atancj 26060 2efiatan 26068 tanatan 26069 dvatan 26085 |
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