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Theorem decbin2 9664
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 9210 . . 3  |-  ( 2  x.  1 )  =  2
21oveq2i 5968 . 2  |-  ( ( 2  x.  ( 2  x.  A ) )  +  ( 2  x.  1 ) )  =  ( ( 2  x.  ( 2  x.  A
) )  +  2 )
3 2cn 9127 . . 3  |-  2  e.  CC
4 decbin.1 . . . . 5  |-  A  e. 
NN0
54nn0cni 9327 . . . 4  |-  A  e.  CC
63, 5mulcli 8097 . . 3  |-  ( 2  x.  A )  e.  CC
7 ax-1cn 8038 . . 3  |-  1  e.  CC
83, 6, 7adddii 8102 . 2  |-  ( 2  x.  ( ( 2  x.  A )  +  1 ) )  =  ( ( 2  x.  ( 2  x.  A
) )  +  ( 2  x.  1 ) )
94decbin0 9663 . . 3  |-  ( 4  x.  A )  =  ( 2  x.  (
2  x.  A ) )
109oveq1i 5967 . 2  |-  ( ( 4  x.  A )  +  2 )  =  ( ( 2  x.  ( 2  x.  A
) )  +  2 )
112, 8, 103eqtr4ri 2238 1  |-  ( ( 4  x.  A )  +  2 )  =  ( 2  x.  (
( 2  x.  A
)  +  1 ) )
Colors of variables: wff set class
Syntax hints:    = wceq 1373    e. wcel 2177  (class class class)co 5957   1c1 7946    + caddc 7948    x. cmul 7950   2c2 9107   4c4 9109   NN0cn0 9315
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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2188  ax-sep 4170  ax-cnex 8036  ax-resscn 8037  ax-1cn 8038  ax-1re 8039  ax-icn 8040  ax-addcl 8041  ax-addrcl 8042  ax-mulcl 8043  ax-mulcom 8046  ax-addass 8047  ax-mulass 8048  ax-distr 8049  ax-1rid 8052  ax-rnegex 8054  ax-cnre 8056
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ral 2490  df-rex 2491  df-v 2775  df-un 3174  df-in 3176  df-ss 3183  df-sn 3644  df-pr 3645  df-op 3647  df-uni 3857  df-int 3892  df-br 4052  df-iota 5241  df-fv 5288  df-ov 5960  df-inn 9057  df-2 9115  df-3 9116  df-4 9117  df-n0 9316
This theorem is referenced by:  decbin3  9665
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