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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 12405 | . . 3 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq1i 7430 | . 2 ⊢ (2 · 𝐴) = ((1 + 1) · 𝐴) |
| 3 | 1p1times 11481 | . 2 ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴)) | |
| 4 | 2, 3 | eqtrid 2807 | 1 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 (class class class)co 7420 ℂcc 11198 1c1 11201 + caddc 11203 · cmul 11205 2c2 12397 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-mulcl 11262 ax-mulcom 11264 ax-mulass 11266 ax-distr 11267 ax-1rid 11270 ax-cnre 11273 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-iota 6494 df-fv 6546 df-ov 7423 df-2 12405 |
| This theorem is used by: times2 12479 2timesi 12480 2txmxeqx 12482 2halves 12564 halfaddsub 12579 avglt2 12585 2timesd 12589 expubnd 14321 absmax 15497 sinmul 16340 sin2t 16345 cos2t 16346 sadadd2lem2 16620 pythagtriplem4 16997 pythagtriplem14 17006 pythagtriplem16 17008 2sqreultlem 27774 2sqreunnltlem 27777 cncph 31421 pellexlem2 43837 acongrep 43987 sub2times 46289 2timesgt 46304 |
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