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Theorem 2times 9441
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.)
Assertion
Ref Expression
2times (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴))

Proof of Theorem 2times
StepHypRef Expression
1 df-2 9372 . . 3 2 = (1 + 1)
21oveq1i 6098 . 2 (2 · 𝐴) = ((1 + 1) · 𝐴)
3 1p1times 8467 . 2 (𝐴 ∈ ℂ → ((1 + 1) · 𝐴) = (𝐴 + 𝐴))
42, 3eqtrid 2283 1 (𝐴 ∈ ℂ → (2 · 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 6088  ℂcc 8183  1c1 8186   + caddc 8188   · cmul 8190  2c2 9364
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 8277  ax-1cn 8278  ax-icn 8280  ax-addcl 8281  ax-mulcl 8283  ax-mulcom 8286  ax-mulass 8288  ax-distr 8289  ax-1rid 8292  ax-cnre 8296
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 4132  df-iota 5340  df-fv 5388  df-ov 6091  df-2 9372
This theorem is used by:  times2  9442  2timesi  9443  2txmxeqx  9445  2halves  9545  halfaddsub  9550  avglt2  9556  2timesd  9559  expubnd  11054  subsq2  11105  sinmul  12536  sin2t  12541  cos2t  12542  pythagtriplem4  13076  pythagtriplem14  13085  pythagtriplem16  13087  pellexlem2  16230
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