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Theorem decbin0 9749
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 9297 . . 3  |-  ( 2  x.  2 )  =  4
21oveq1i 6027 . 2  |-  ( ( 2  x.  2 )  x.  A )  =  ( 4  x.  A
)
3 2cn 9213 . . 3  |-  2  e.  CC
4 decbin.1 . . . 4  |-  A  e. 
NN0
54nn0cni 9413 . . 3  |-  A  e.  CC
63, 3, 5mulassi 8187 . 2  |-  ( ( 2  x.  2 )  x.  A )  =  ( 2  x.  (
2  x.  A ) )
72, 6eqtr3i 2254 1  |-  ( 4  x.  A )  =  ( 2  x.  (
2  x.  A ) )
Colors of variables: wff set class
Syntax hints:    = wceq 1397    e. wcel 2202  (class class class)co 6017    x. cmul 8036   2c2 9193   4c4 9195   NN0cn0 9401
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213  ax-sep 4207  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-mulcom 8132  ax-addass 8133  ax-mulass 8134  ax-distr 8135  ax-1rid 8138  ax-rnegex 8140  ax-cnre 8142
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-iota 5286  df-fv 5334  df-ov 6020  df-inn 9143  df-2 9201  df-3 9202  df-4 9203  df-n0 9402
This theorem is referenced by:  decbin2  9750
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