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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 3863 | . . 3 ⊢ (𝐴 ∈ (ℂ ∖ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ {-i, i})) | |
2 | elprg 4548 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴 ∈ {-i, i} ↔ (𝐴 = -i ∨ 𝐴 = i))) | |
3 | 2 | notbid 321 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (¬ 𝐴 ∈ {-i, i} ↔ ¬ (𝐴 = -i ∨ 𝐴 = i))) |
4 | neanior 3024 | . . . . 5 ⊢ ((𝐴 ≠ -i ∧ 𝐴 ≠ i) ↔ ¬ (𝐴 = -i ∨ 𝐴 = i)) | |
5 | 3, 4 | bitr4di 292 | . . . 4 ⊢ (𝐴 ∈ ℂ → (¬ 𝐴 ∈ {-i, i} ↔ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
6 | 5 | pm5.32i 578 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
7 | 1, 6 | bitri 278 | . 2 ⊢ (𝐴 ∈ (ℂ ∖ {-i, i}) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) |
8 | ovex 7224 | . . . 4 ⊢ ((i / 2) · ((log‘(1 − (i · 𝑥))) − (log‘(1 + (i · 𝑥))))) ∈ V | |
9 | df-atan 25704 | . . . 4 ⊢ arctan = (𝑥 ∈ (ℂ ∖ {-i, i}) ↦ ((i / 2) · ((log‘(1 − (i · 𝑥))) − (log‘(1 + (i · 𝑥)))))) | |
10 | 8, 9 | dmmpti 6500 | . . 3 ⊢ dom arctan = (ℂ ∖ {-i, i}) |
11 | 10 | eleq2i 2822 | . 2 ⊢ (𝐴 ∈ dom arctan ↔ 𝐴 ∈ (ℂ ∖ {-i, i})) |
12 | 3anass 1097 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i) ↔ (𝐴 ∈ ℂ ∧ (𝐴 ≠ -i ∧ 𝐴 ≠ i))) | |
13 | 7, 11, 12 | 3bitr4i 306 | 1 ⊢ (𝐴 ∈ dom arctan ↔ (𝐴 ∈ ℂ ∧ 𝐴 ≠ -i ∧ 𝐴 ≠ i)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 209 ∧ wa 399 ∨ wo 847 ∧ w3a 1089 = wceq 1543 ∈ wcel 2112 ≠ wne 2932 ∖ cdif 3850 {cpr 4529 dom cdm 5536 ‘cfv 6358 (class class class)co 7191 ℂcc 10692 1c1 10695 ici 10696 + caddc 10697 · cmul 10699 − cmin 11027 -cneg 11028 / cdiv 11454 2c2 11850 logclog 25397 arctancatan 25701 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-sbc 3684 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-opab 5102 df-mpt 5121 df-id 5440 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-iota 6316 df-fun 6360 df-fn 6361 df-fv 6366 df-ov 7194 df-atan 25704 |
This theorem is referenced by: atandm2 25714 atandm3 25715 atancj 25747 2efiatan 25755 tanatan 25756 dvatan 25772 |
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