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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 12309 | . . 3 ⊢ 2 = (1 + 1) | |
| 2 | 1 | oveq1i 7422 | . 2 ⊢ (2 · 𝐴) = ((1 + 1) · 𝐴) |
| 3 | 1p1times 11387 | . 2 ⊢ (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴)) | |
| 4 | 2, 3 | eqtrid 2809 | 1 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2142 (class class class)co 7412 ℂcc 11104 1c1 11107 + caddc 11109 · cmul 11111 2c2 12301 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-mulcl 11168 ax-mulcom 11170 ax-mulass 11172 ax-distr 11173 ax-1rid 11176 ax-cnre 11179 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-iota 6492 df-fv 6544 df-ov 7415 df-2 12309 |
| This theorem is used by: times2 12383 2timesi 12384 2txmxeqx 12386 2halves 12468 halfaddsub 12483 avglt2 12489 2timesd 12493 expubnd 14221 absmax 15388 sinmul 16234 sin2t 16239 cos2t 16240 sadadd2lem2 16514 pythagtriplem4 16885 pythagtriplem14 16894 pythagtriplem16 16896 2sqreultlem 27622 2sqreunnltlem 27625 cncph 31182 pellexlem2 43585 acongrep 43735 sub2times 46020 2timesgt 46035 |
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