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| Mirrors > Home > MPE Home > Th. List > igamgam | Structured version Visualization version GIF version | ||
| Description: Value of the inverse Gamma function in terms of the Gamma function. (Contributed by Mario Carneiro, 16-Jul-2017.) |
| Ref | Expression |
|---|---|
| igamgam | ⊢ (𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)) → (1/Γ‘𝐴) = (1 / (Γ‘𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldif 3909 | . 2 ⊢ (𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)) ↔ (𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ (ℤ ∖ ℕ))) | |
| 2 | igamval 27284 | . . 3 ⊢ (𝐴 ∈ ℂ → (1/Γ‘𝐴) = if(𝐴 ∈ (ℤ ∖ ℕ), 0, (1 / (Γ‘𝐴)))) | |
| 3 | iffalse 4491 | . . 3 ⊢ (¬ 𝐴 ∈ (ℤ ∖ ℕ) → if(𝐴 ∈ (ℤ ∖ ℕ), 0, (1 / (Γ‘𝐴))) = (1 / (Γ‘𝐴))) | |
| 4 | 2, 3 | sylan9eq 2815 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 𝐴 ∈ (ℤ ∖ ℕ)) → (1/Γ‘𝐴) = (1 / (Γ‘𝐴))) |
| 5 | 1, 4 | sylbi 220 | 1 ⊢ (𝐴 ∈ (ℂ ∖ (ℤ ∖ ℕ)) → (1/Γ‘𝐴) = (1 / (Γ‘𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∖ cdif 3896 ifcif 4482 ‘cfv 6533 (class class class)co 7414 ℂcc 11123 0cc0 11125 1c1 11126 / cdiv 11896 ℕcn 12258 ℤcz 12616 Γcgam 27254 1/Γcigam 27255 |
| 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-pr 5398 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-mulcl 11187 ax-i2m1 11193 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fv 6541 df-ov 7417 df-igam 27258 |
| This theorem is used by: igamlgam 27287 gamigam 27290 |
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