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| Mirrors > Home > ILE Home > Th. List > 1p1times | GIF version | ||
| Description: Two times a number. (Contributed by NM, 18-May-1999.) (Revised by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| 1p1times | ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 8272 | . . . 4 ⊢ 1 ∈ ℂ | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (𝐴 ∈ ℂ → 1 ∈ ℂ) |
| 3 | id 19 | . . 3 ⊢ (𝐴 ∈ ℂ → 𝐴 ∈ ℂ) | |
| 4 | 2, 2, 3 | adddird 8351 | . 2 ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = ((1 · 𝐴) + (1 · 𝐴))) |
| 5 | mullid 8324 | . . 3 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) | |
| 6 | 5, 5 | oveq12d 6103 | . 2 ⊢ (𝐴 ∈ ℂ → ((1 · 𝐴) + (1 · 𝐴)) = (𝐴 + 𝐴)) |
| 7 | 4, 6 | eqtrd 2271 | 1 ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∈ wcel 2209 (class class class)co 6085 ℂcc 8177 1c1 8180 + caddc 8182 · cmul 8184 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-resscn 8271 ax-1cn 8272 ax-icn 8274 ax-addcl 8275 ax-mulcl 8277 ax-mulcom 8280 ax-mulass 8282 ax-distr 8283 ax-1rid 8286 ax-cnre 8290 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-iota 5337 df-fv 5385 df-ov 6088 |
| This theorem is used by: eqneg 9062 2times 9432 |
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