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Theorem supfz 17026
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 535 . . . 4  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  x  e.  ZZ )
21zred 9747 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  x  e.  RR )
3 simprr 537 . . . 4  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  y  e.  ZZ )
43zred 9747 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  y  e.  RR )
52, 4lttri3d 8430 . 2  |-  ( ( N  e.  ( ZZ>= `  M )  /\  (
x  e.  ZZ  /\  y  e.  ZZ )
)  ->  ( x  =  y  <->  ( -.  x  <  y  /\  -.  y  <  x ) ) )
6 eluzelz 9910 . 2  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  ZZ )
7 eluzfz2 10415 . 2  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  ( M ... N ) )
8 elfzle2 10411 . . . 4  |-  ( z  e.  ( M ... N )  ->  z  <_  N )
98adantl 277 . . 3  |-  ( ( N  e.  ( ZZ>= `  M )  /\  z  e.  ( M ... N
) )  ->  z  <_  N )
10 elfzelz 10407 . . . . 5  |-  ( z  e.  ( M ... N )  ->  z  e.  ZZ )
1110zred 9747 . . . 4  |-  ( z  e.  ( M ... N )  ->  z  e.  RR )
126zred 9747 . . . 4  |-  ( N  e.  ( ZZ>= `  M
)  ->  N  e.  RR )
13 lenlt 8391 . . . 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 7334 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 1402    e. wcel 2209   class class class wbr 4125   ` cfv 5372  (class class class)co 6075   supcsup 7312   RRcr 8168    < clt 8350    <_ cle 8351   ZZcz 9623   ZZ>=cuz 9900   ...cfz 10390
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-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-pre-ltirr 8281  ax-pre-apti 8284
This theorem depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  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-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  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-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-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-sup 7314  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-neg 8490  df-z 9624  df-uz 9901  df-fz 10391
This theorem is referenced by: (None)
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