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Theorem infssuzledc 10557
Description: The infimum of a subset of an upper set of integers is less than or equal to all members of the subset. (Contributed by Jim Kingdon, 13-Jan-2022.)
Hypotheses
Ref Expression
infssuzledc.m  |-  ( ph  ->  M  e.  ZZ )
infssuzledc.s  |-  S  =  { n  e.  (
ZZ>= `  M )  |  ps }
infssuzledc.a  |-  ( ph  ->  A  e.  S )
infssuzledc.dc  |-  ( (
ph  /\  n  e.  ( M ... A ) )  -> DECID  ps )
Assertion
Ref Expression
infssuzledc  |-  ( ph  -> inf ( S ,  RR ,  <  )  <_  A
)
Distinct variable groups:    A, n    n, M    ph, n
Allowed substitution hints:    ps( n)    S( n)

Proof of Theorem infssuzledc
Dummy variables  y  a  b  x  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 lttri3 8318 . . . 4  |-  ( ( a  e.  RR  /\  b  e.  RR )  ->  ( a  =  b  <-> 
( -.  a  < 
b  /\  -.  b  <  a ) ) )
21adantl 277 . . 3  |-  ( (
ph  /\  ( a  e.  RR  /\  b  e.  RR ) )  -> 
( a  =  b  <-> 
( -.  a  < 
b  /\  -.  b  <  a ) ) )
3 infssuzledc.m . . . 4  |-  ( ph  ->  M  e.  ZZ )
4 infssuzledc.s . . . 4  |-  S  =  { n  e.  (
ZZ>= `  M )  |  ps }
5 infssuzledc.a . . . 4  |-  ( ph  ->  A  e.  S )
6 infssuzledc.dc . . . 4  |-  ( (
ph  /\  n  e.  ( M ... A ) )  -> DECID  ps )
73, 4, 5, 6infssuzex 10556 . . 3  |-  ( ph  ->  E. x  e.  RR  ( A. y  e.  S  -.  y  <  x  /\  A. y  e.  RR  (
x  <  y  ->  E. z  e.  S  z  <  y ) ) )
82, 7infclti 7282 . 2  |-  ( ph  -> inf ( S ,  RR ,  <  )  e.  RR )
9 elrabi 2960 . . . 4  |-  ( A  e.  { n  e.  ( ZZ>= `  M )  |  ps }  ->  A  e.  ( ZZ>= `  M )
)
109, 4eleq2s 2326 . . 3  |-  ( A  e.  S  ->  A  e.  ( ZZ>= `  M )
)
11 eluzelre 9827 . . 3  |-  ( A  e.  ( ZZ>= `  M
)  ->  A  e.  RR )
125, 10, 113syl 17 . 2  |-  ( ph  ->  A  e.  RR )
132, 7inflbti 7283 . . 3  |-  ( ph  ->  ( A  e.  S  ->  -.  A  < inf ( S ,  RR ,  <  ) ) )
145, 13mpd 13 . 2  |-  ( ph  ->  -.  A  < inf ( S ,  RR ,  <  ) )
158, 12, 14nltled 8359 1  |-  ( ph  -> inf ( S ,  RR ,  <  )  <_  A
)
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    <-> wb 105  DECID wdc 842    = wceq 1398    e. wcel 2202   {crab 2515   class class class wbr 4093   ` cfv 5333  (class class class)co 6028  infcinf 7242   RRcr 8091    < clt 8273    <_ cle 8274   ZZcz 9540   ZZ>=cuz 9816   ...cfz 10305
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-cnex 8183  ax-resscn 8184  ax-1cn 8185  ax-1re 8186  ax-icn 8187  ax-addcl 8188  ax-addrcl 8189  ax-mulcl 8190  ax-addcom 8192  ax-addass 8194  ax-distr 8196  ax-i2m1 8197  ax-0lt1 8198  ax-0id 8200  ax-rnegex 8201  ax-cnre 8203  ax-pre-ltirr 8204  ax-pre-ltwlin 8205  ax-pre-lttrn 8206  ax-pre-apti 8207  ax-pre-ltadd 8208
This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-reu 2518  df-rmo 2519  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-fv 5341  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-sup 7243  df-inf 7244  df-pnf 8275  df-mnf 8276  df-xr 8277  df-ltxr 8278  df-le 8279  df-sub 8411  df-neg 8412  df-inn 9203  df-n0 9462  df-z 9541  df-uz 9817  df-fz 10306  df-fzo 10440
This theorem is referenced by:  zsupssdc  10561  bitsfzolem  12595  nnminle  12686  nninfctlemfo  12691  lcmledvds  12722  odzdvds  12898  4sqlem13m  13056  4sqlem17  13060
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