Users' Mathboxes Mathbox for Jim Kingdon < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >   Mathboxes  >  supfz Unicode version

Theorem supfz 16439
Description: The supremum of a finite sequence of integers. (Contributed by Scott Fenton, 8-Aug-2013.) (Revised by Jim Kingdon, 15-Oct-2022.)
Assertion
Ref Expression
supfz  |-  ( N  e.  ( ZZ>= `  M
)  ->  sup (
( M ... N
) ,  ZZ ,  <  )  =  N )

Proof of Theorem supfz
Dummy variables  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simprl 529 . . . 4  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  x  e.  ZZ )
21zred 9569 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  x  e.  RR )
3 simprr 531 . . . 4  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  y  e.  ZZ )
43zred 9569 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  y  e.  RR )
52, 4lttri3d 8261 . 2  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  ( x  =  y  <->  ( -.  x  <  y  /\  -.  y  <  x ) ) )
6 eluzelz 9731 . 2  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  ZZ )
7 eluzfz2 10228 . 2  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  ( M ... N ) )
8 elfzle2 10224 . . . 4  |-  ( z  e.  ( M ... N )  ->  z  <_  N )
98adantl 277 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  z  e.  ( M ... N
) )  ->  z  <_  N )
10 elfzelz 10221 . . . . 5  |-  ( z  e.  ( M ... N )  ->  z  e.  ZZ )
1110zred 9569 . . . 4  |-  ( z  e.  ( M ... N )  ->  z  e.  RR )
126zred 9569 . . . 4  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  RR )
13 lenlt 8222 . . . 4  |-  ( ( z  e.  RR  /\  N  e.  RR )  ->  ( z  <_  N  <->  -.  N  <  z ) )
1411, 12, 13syl2anr 290 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  z  e.  ( M ... N
) )  ->  (
z  <_  N  <->  -.  N  <  z ) )
159, 14mpbid 147 . 2  |-  ( ( N  e.  ( ZZ>= `  M )  /\  z  e.  ( M ... N
) )  ->  -.  N  <  z )
165, 6, 7, 15supmaxti 7171 1  |-  ( N  e.  ( ZZ>= `  M
)  ->  sup (
( M ... N
) ,  ZZ ,  <  )  =  N )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1395    e. wcel 2200   class class class wbr 4083   ` cfv 5318  (class class class)co 6001   supcsup 7149   RRcr 7998    < clt 8181    <_ cle 8182   ZZcz 9446   ZZ>=cuz 9722   ...cfz 10204
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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8090  ax-resscn 8091  ax-pre-ltirr 8111  ax-pre-apti 8114
This theorem depends on definitions:  df-bi 117  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-fv 5326  df-riota 5954  df-ov 6004  df-oprab 6005  df-mpo 6006  df-sup 7151  df-pnf 8183  df-mnf 8184  df-xr 8185  df-ltxr 8186  df-le 8187  df-neg 8320  df-z 9447  df-uz 9723  df-fz 10205
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator