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Theorem 2times 8976
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  e.  CC  ->  (
2  x.  A )  =  ( A  +  A ) )

Proof of Theorem 2times
StepHypRef Expression
1 df-2 8907 . . 3  |-  2  =  ( 1  +  1 )
21oveq1i 5846 . 2  |-  ( 2  x.  A )  =  ( ( 1  +  1 )  x.  A
)
3 1p1times 8023 . 2  |-  ( A  e.  CC  ->  (
( 1  +  1 )  x.  A )  =  ( A  +  A ) )
42, 3syl5eq 2209 1  |-  ( A  e.  CC  ->  (
2  x.  A )  =  ( A  +  A ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1342    e. wcel 2135  (class class class)co 5836   CCcc 7742   1c1 7745    + caddc 7747    x. cmul 7749   2c2 8899
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146  ax-resscn 7836  ax-1cn 7837  ax-icn 7839  ax-addcl 7840  ax-mulcl 7842  ax-mulcom 7845  ax-mulass 7847  ax-distr 7848  ax-1rid 7851  ax-cnre 7855
This theorem depends on definitions:  df-bi 116  df-3an 969  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ral 2447  df-rex 2448  df-v 2723  df-un 3115  df-in 3117  df-ss 3124  df-sn 3576  df-pr 3577  df-op 3579  df-uni 3784  df-br 3977  df-iota 5147  df-fv 5190  df-ov 5839  df-2 8907
This theorem is referenced by:  times2  8977  2timesi  8978  2halves  9077  halfaddsub  9082  avglt2  9087  2timesd  9090  expubnd  10502  subsq2  10552  sinmul  11671  sin2t  11676  cos2t  11677  pythagtriplem4  12177  pythagtriplem14  12186  pythagtriplem16  12188
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