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Theorem bitsfval 12687
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 6098 . . . . 5  |-  ( n  =  N  ->  ( |_ `  ( n  / 
( 2 ^ m
) ) )  =  ( |_ `  ( N  /  ( 2 ^ m ) ) ) )
21breq2d 4137 . . . 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 12686 . 2  |- bits  =  ( n  e.  ZZ  |->  { m  e.  NN0  |  -.  2  ||  ( |_
`  ( n  / 
( 2 ^ m
) ) ) } )
6 nn0ex 9548 . . 3  |-  NN0  e.  _V
76rabex 4275 . 2  |-  { m  e.  NN0  |  -.  2  ||  ( |_ `  ( N  /  ( 2 ^ m ) ) ) }  e.  _V
84, 5, 7fvmpt 5776 1  |-  ( N  e.  ZZ  ->  (bits `  N )  =  {
m  e.  NN0  |  -.  2  ||  ( |_
`  ( N  / 
( 2 ^ m
) ) ) } )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    = wceq 1402    e. wcel 2209   {crab 2532   class class class wbr 4125   ` cfv 5372  (class class class)co 6075    / cdiv 8992   2c2 9334   NN0cn0 9542   ZZcz 9623   |_cfl 10681   ^cexp 10953    || cdvds 12532  bitscbits 12685
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-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 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-i2m1 8274
This theorem 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 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-iota 5332  df-fun 5374  df-fv 5380  df-ov 6078  df-inn 9284  df-n0 9543  df-bits 12686
This theorem is referenced by:  bitsval  12688
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