ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  uzval Unicode version

Theorem uzval 8621
Description: The value of the upper integers function. (Contributed by NM, 5-Sep-2005.) (Revised by Mario Carneiro, 3-Nov-2013.)
Assertion
Ref Expression
uzval  |-  ( N  e.  ZZ  ->  ( ZZ>=
`  N )  =  { k  e.  ZZ  |  N  <_  k } )
Distinct variable group:    k, N

Proof of Theorem uzval
Dummy variable  j is distinct from all other variables.
StepHypRef Expression
1 breq1 3788 . . 3  |-  ( j  =  N  ->  (
j  <_  k  <->  N  <_  k ) )
21rabbidv 2593 . 2  |-  ( j  =  N  ->  { k  e.  ZZ  |  j  <_  k }  =  { k  e.  ZZ  |  N  <_  k } )
3 df-uz 8620 . 2  |-  ZZ>=  =  ( j  e.  ZZ  |->  { k  e.  ZZ  | 
j  <_  k }
)
4 zex 8360 . . 3  |-  ZZ  e.  _V
54rabex 3922 . 2  |-  { k  e.  ZZ  |  N  <_  k }  e.  _V
62, 3, 5fvmpt 5270 1  |-  ( N  e.  ZZ  ->  ( ZZ>=
`  N )  =  { k  e.  ZZ  |  N  <_  k } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1284    e. wcel 1433   {crab 2352   class class class wbr 3785   ` cfv 4922    <_ cle 7154   ZZcz 8351   ZZ>=cuz 8619
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-sep 3896  ax-pow 3948  ax-pr 3964  ax-cnex 7067  ax-resscn 7068
This theorem depends on definitions:  df-bi 115  df-3or 920  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-rex 2354  df-rab 2357  df-v 2603  df-sbc 2816  df-un 2977  df-in 2979  df-ss 2986  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-br 3786  df-opab 3840  df-mpt 3841  df-id 4048  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-iota 4887  df-fun 4924  df-fv 4930  df-ov 5535  df-neg 7282  df-z 8352  df-uz 8620
This theorem is referenced by:  eluz1  8623  nn0uz  8653  nnuz  8654  ialgfx  10434
  Copyright terms: Public domain W3C validator