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Theorem decbin0 9717
Description: Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.)
Hypothesis
Ref Expression
decbin.1  |-  A  e. 
NN0
Assertion
Ref Expression
decbin0  |-  ( 4  x.  A )  =  ( 2  x.  (
2  x.  A ) )

Proof of Theorem decbin0
StepHypRef Expression
1 2t2e4 9265 . . 3  |-  ( 2  x.  2 )  =  4
21oveq1i 6011 . 2  |-  ( ( 2  x.  2 )  x.  A )  =  ( 4  x.  A
)
3 2cn 9181 . . 3  |-  2  e.  CC
4 decbin.1 . . . 4  |-  A  e. 
NN0
54nn0cni 9381 . . 3  |-  A  e.  CC
63, 3, 5mulassi 8155 . 2  |-  ( ( 2  x.  2 )  x.  A )  =  ( 2  x.  (
2  x.  A ) )
72, 6eqtr3i 2252 1  |-  ( 4  x.  A )  =  ( 2  x.  (
2  x.  A ) )
Colors of variables: wff set class
Syntax hints:    = wceq 1395    e. wcel 2200  (class class class)co 6001    x. cmul 8004   2c2 9161   4c4 9163   NN0cn0 9369
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-sep 4202  ax-cnex 8090  ax-resscn 8091  ax-1cn 8092  ax-1re 8093  ax-icn 8094  ax-addcl 8095  ax-addrcl 8096  ax-mulcl 8097  ax-mulcom 8100  ax-addass 8101  ax-mulass 8102  ax-distr 8103  ax-1rid 8106  ax-rnegex 8108  ax-cnre 8110
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-int 3924  df-br 4084  df-iota 5278  df-fv 5326  df-ov 6004  df-inn 9111  df-2 9169  df-3 9170  df-4 9171  df-n0 9370
This theorem is referenced by:  decbin2  9718
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