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Theorem mullidd 8175
Description: Identity law for multiplication. (Contributed by Mario Carneiro, 27-May-2016.)
Hypothesis
Ref Expression
addcld.1  |-  ( ph  ->  A  e.  CC )
Assertion
Ref Expression
mullidd  |-  ( ph  ->  ( 1  x.  A
)  =  A )

Proof of Theorem mullidd
StepHypRef Expression
1 addcld.1 . 2  |-  ( ph  ->  A  e.  CC )
2 mullid 8155 . 2  |-  ( A  e.  CC  ->  (
1  x.  A )  =  A )
31, 2syl 14 1  |-  ( ph  ->  ( 1  x.  A
)  =  A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1395    e. wcel 2200  (class class class)co 6007   CCcc 8008   1c1 8011    x. cmul 8015
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-resscn 8102  ax-1cn 8103  ax-icn 8105  ax-addcl 8106  ax-mulcl 8108  ax-mulcom 8111  ax-mulass 8113  ax-distr 8114  ax-1rid 8117  ax-cnre 8121
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-iota 5278  df-fv 5326  df-ov 6010
This theorem is referenced by:  subhalfhalf  9357  bitsfzolem  12480  bitsfzo  12481  4sqlem18  12946  plypow  15433  wilthlem1  15669  mersenne  15686  perfectlem2  15689  gausslemma2dlem1a  15752  gausslemma2dlem4  15758  gausslemma2dlem7  15762  gausslemma2d  15763  lgseisenlem1  15764  lgseisenlem2  15765  lgseisenlem4  15767  lgsquad2lem1  15775
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