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Theorem bitsfval 12709
Description: Expand the definition of the bits of an integer. (Contributed by Mario Carneiro, 5-Sep-2016.)
Assertion
Ref Expression
bitsfval  |-  ( N  e.  ZZ  ->  (bits `  N )  =  {
m  e.  NN0  |  -.  2  ||  ( |_
`  ( N  / 
( 2 ^ m
) ) ) } )
Distinct variable group:    m, N

Proof of Theorem bitsfval
Dummy variable  n is distinct from all other variables.
StepHypRef Expression
1 fvoveq1 6108 . . . . 5  |-  ( n  =  N  ->  ( |_ `  ( n  / 
( 2 ^ m
) ) )  =  ( |_ `  ( N  /  ( 2 ^ m ) ) ) )
21breq2d 4142 . . . 4  |-  ( n  =  N  ->  (
2  ||  ( |_ `  ( n  /  (
2 ^ m ) ) )  <->  2  ||  ( |_ `  ( N  /  ( 2 ^ m ) ) ) ) )
32notbid 677 . . 3  |-  ( n  =  N  ->  ( -.  2  ||  ( |_
`  ( n  / 
( 2 ^ m
) ) )  <->  -.  2  ||  ( |_ `  ( N  /  ( 2 ^ m ) ) ) ) )
43rabbidv 2810 . 2  |-  ( n  =  N  ->  { m  e.  NN0  |  -.  2  ||  ( |_ `  (
n  /  ( 2 ^ m ) ) ) }  =  {
m  e.  NN0  |  -.  2  ||  ( |_
`  ( N  / 
( 2 ^ m
) ) ) } )
5 df-bits 12708 . 2  |- bits  =  ( n  e.  ZZ  |->  { m  e.  NN0  |  -.  2  ||  ( |_
`  ( n  / 
( 2 ^ m
) ) ) } )
6 nn0ex 9569 . . 3  |-  NN0  e.  _V
76rabex 4280 . 2  |-  { m  e.  NN0  |  -.  2  ||  ( |_ `  ( N  /  ( 2 ^ m ) ) ) }  e.  _V
84, 5, 7fvmpt 5782 1  |-  ( N  e.  ZZ  ->  (bits `  N )  =  {
m  e.  NN0  |  -.  2  ||  ( |_
`  ( N  / 
( 2 ^ m
) ) ) } )
Colors of variables:    wff set class
This proof depends on syntax axioms:   -. wn 3    -> wi 4    = wceq 1402    e. wcel 2209   {crab 2532   class class class wbr 4130   ` cfv 5377  (class class class)co 6085    / cdiv 9002   2c2 9355   NN0cn0 9563   ZZcz 9644   |_cfl 10703   ^cexp 10975    || cdvds 12554  bitscbits 12707
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-i2m1 8284
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-iota 5337  df-fun 5379  df-fv 5385  df-ov 6088  df-inn 9305  df-n0 9564  df-bits 12708
This theorem is used by:  bitsval  12710
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