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Theorem bitsf 12696
Description: The bits function is a function from integers to subsets of nonnegative integers. (Contributed by Mario Carneiro, 5-Sep-2016.)
Assertion
Ref Expression
bitsf  |- bits : ZZ --> ~P NN0

Proof of Theorem bitsf
Dummy variables  k  n are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-bits 12691 . 2  |- bits  =  ( n  e.  ZZ  |->  { k  e.  NN0  |  -.  2  ||  ( |_
`  ( n  / 
( 2 ^ k
) ) ) } )
2 nn0ex 9552 . . . 4  |-  NN0  e.  _V
3 ssrab2 3333 . . . 4  |-  { k  e.  NN0  |  -.  2  ||  ( |_ `  ( n  /  (
2 ^ k ) ) ) }  C_  NN0
42, 3elpwi2 4292 . . 3  |-  { k  e.  NN0  |  -.  2  ||  ( |_ `  ( n  /  (
2 ^ k ) ) ) }  e.  ~P NN0
54a1i 9 . 2  |-  ( n  e.  ZZ  ->  { k  e.  NN0  |  -.  2  ||  ( |_ `  ( n  /  (
2 ^ k ) ) ) }  e.  ~P NN0 )
61, 5fmpti 5854 1  |- bits : ZZ --> ~P NN0
Colors of variables: wff set class
Syntax hints:   -. wn 3    e. wcel 2209   {crab 2532   _Vcvv 2821   ~Pcpw 3688   class class class wbr 4128   -->wf 5371   ` cfv 5375  (class class class)co 6079    / cdiv 8996   2c2 9338   NN0cn0 9546   ZZcz 9627   |_cfl 10686   ^cexp 10958    || cdvds 12537  bitscbits 12690
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 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 4247  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-cnex 8264  ax-resscn 8265  ax-1cn 8266  ax-1re 8267  ax-icn 8268  ax-addcl 8269  ax-addrcl 8270  ax-mulcl 8271  ax-i2m1 8278
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 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-fv 5383  df-inn 9288  df-n0 9547  df-bits 12691
This theorem is referenced by: (None)
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