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| Mirrors > Home > MPE Home > Th. List > 2times | Structured version Visualization version GIF version | ||
| Description: Two times a number. (Contributed by NM, 10-Oct-2004.) (Revised by Mario Carneiro, 27-May-2016.) (Proof shortened by AV, 26-Feb-2020.) |
| Ref | Expression |
|---|---|
| 2times | ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-2 12429 | . . 3 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq1i 7450 | . 2 ⊢ (2 · 𝐴) = ((1 + 1) · 𝐴) |
| 3 | 1p1times 11505 | . 2 ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴)) | |
| 4 | 2, 3 | eqtrid 2810 | 1 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 (class class class)co 7440 ℂcc 11222 1c1 11225 + caddc 11227 · cmul 11229 2c2 12421 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-mulcl 11286 ax-mulcom 11288 ax-mulass 11290 ax-distr 11291 ax-1rid 11294 ax-cnre 11297 |
| 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-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-iota 6509 df-fv 6563 df-ov 7443 df-2 12429 |
| This theorem is used by: times2 12503 2timesi 12504 2txmxeqx 12506 2halves 12588 halfaddsub 12603 avglt2 12609 2timesd 12613 expubnd 14345 absmax 15523 sinmul 16366 sin2t 16371 cos2t 16372 sadadd2lem2 16646 pythagtriplem4 17023 pythagtriplem14 17032 pythagtriplem16 17034 2sqreultlem 27801 2sqreunnltlem 27804 cncph 31448 pellexlem2 44028 acongrep 44178 sub2times 46492 2timesgt 46507 |
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