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Theorem decbin2 9483
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
decbin2  |-  ( ( 4  x.  A )  +  2 )  =  ( 2  x.  (
( 2  x.  A
)  +  1 ) )

Proof of Theorem decbin2
StepHypRef Expression
1 2t1e2 9031 . . 3  |-  ( 2  x.  1 )  =  2
21oveq2i 5864 . 2  |-  ( ( 2  x.  ( 2  x.  A ) )  +  ( 2  x.  1 ) )  =  ( ( 2  x.  ( 2  x.  A
) )  +  2 )
3 2cn 8949 . . 3  |-  2  e.  CC
4 decbin.1 . . . . 5  |-  A  e. 
NN0
54nn0cni 9147 . . . 4  |-  A  e.  CC
63, 5mulcli 7925 . . 3  |-  ( 2  x.  A )  e.  CC
7 ax-1cn 7867 . . 3  |-  1  e.  CC
83, 6, 7adddii 7930 . 2  |-  ( 2  x.  ( ( 2  x.  A )  +  1 ) )  =  ( ( 2  x.  ( 2  x.  A
) )  +  ( 2  x.  1 ) )
94decbin0 9482 . . 3  |-  ( 4  x.  A )  =  ( 2  x.  (
2  x.  A ) )
109oveq1i 5863 . 2  |-  ( ( 4  x.  A )  +  2 )  =  ( ( 2  x.  ( 2  x.  A
) )  +  2 )
112, 8, 103eqtr4ri 2202 1  |-  ( ( 4  x.  A )  +  2 )  =  ( 2  x.  (
( 2  x.  A
)  +  1 ) )
Colors of variables: wff set class
Syntax hints:    = wceq 1348    e. wcel 2141  (class class class)co 5853   1c1 7775    + caddc 7777    x. cmul 7779   2c2 8929   4c4 8931   NN0cn0 9135
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 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152  ax-sep 4107  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-1rid 7881  ax-rnegex 7883  ax-cnre 7885
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-br 3990  df-iota 5160  df-fv 5206  df-ov 5856  df-inn 8879  df-2 8937  df-3 8938  df-4 8939  df-n0 9136
This theorem is referenced by:  decbin3  9484
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