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Theorem fzdisj 9147
Description: Condition for two finite intervals of integers to be disjoint. (Contributed by Jeff Madsen, 17-Jun-2010.)
Assertion
Ref Expression
fzdisj  |-  ( K  <  M  ->  (
( J ... K
)  i^i  ( M ... N ) )  =  (/) )

Proof of Theorem fzdisj
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 elin 3156 . . . 4  |-  ( x  e.  ( ( J ... K )  i^i  ( M ... N
) )  <->  ( x  e.  ( J ... K
)  /\  x  e.  ( M ... N ) ) )
2 elfzel1 9120 . . . . . . . 8  |-  ( x  e.  ( M ... N )  ->  M  e.  ZZ )
32adantl 271 . . . . . . 7  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  M  e.  ZZ )
43zred 8550 . . . . . 6  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  M  e.  RR )
5 elfzelz 9121 . . . . . . . 8  |-  ( x  e.  ( M ... N )  ->  x  e.  ZZ )
65zred 8550 . . . . . . 7  |-  ( x  e.  ( M ... N )  ->  x  e.  RR )
76adantl 271 . . . . . 6  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  x  e.  RR )
8 elfzel2 9119 . . . . . . . 8  |-  ( x  e.  ( J ... K )  ->  K  e.  ZZ )
98adantr 270 . . . . . . 7  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  K  e.  ZZ )
109zred 8550 . . . . . 6  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  K  e.  RR )
11 elfzle1 9122 . . . . . . 7  |-  ( x  e.  ( M ... N )  ->  M  <_  x )
1211adantl 271 . . . . . 6  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  M  <_  x )
13 elfzle2 9123 . . . . . . 7  |-  ( x  e.  ( J ... K )  ->  x  <_  K )
1413adantr 270 . . . . . 6  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  x  <_  K )
154, 7, 10, 12, 14letrd 7300 . . . . 5  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  M  <_  K )
164, 10lenltd 7294 . . . . 5  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  -> 
( M  <_  K  <->  -.  K  <  M ) )
1715, 16mpbid 145 . . . 4  |-  ( ( x  e.  ( J ... K )  /\  x  e.  ( M ... N ) )  ->  -.  K  <  M )
181, 17sylbi 119 . . 3  |-  ( x  e.  ( ( J ... K )  i^i  ( M ... N
) )  ->  -.  K  <  M )
1918con2i 590 . 2  |-  ( K  <  M  ->  -.  x  e.  ( ( J ... K )  i^i  ( M ... N
) ) )
2019eq0rdv 3295 1  |-  ( K  <  M  ->  (
( J ... K
)  i^i  ( M ... N ) )  =  (/) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 102    = wceq 1285    e. wcel 1434    i^i cin 2973   (/)c0 3258   class class class wbr 3793  (class class class)co 5543   RRcr 7042    < clt 7215    <_ cle 7216   ZZcz 8432   ...cfz 9105
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-in1 577  ax-in2 578  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-13 1445  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2064  ax-sep 3904  ax-pow 3956  ax-pr 3972  ax-un 4196  ax-setind 4288  ax-cnex 7129  ax-resscn 7130  ax-pre-ltwlin 7151
This theorem depends on definitions:  df-bi 115  df-3or 921  df-3an 922  df-tru 1288  df-fal 1291  df-nf 1391  df-sb 1687  df-eu 1945  df-mo 1946  df-clab 2069  df-cleq 2075  df-clel 2078  df-nfc 2209  df-ne 2247  df-nel 2341  df-ral 2354  df-rex 2355  df-rab 2358  df-v 2604  df-sbc 2817  df-dif 2976  df-un 2978  df-in 2980  df-ss 2987  df-nul 3259  df-pw 3392  df-sn 3412  df-pr 3413  df-op 3415  df-uni 3610  df-br 3794  df-opab 3848  df-mpt 3849  df-id 4056  df-xp 4377  df-rel 4378  df-cnv 4379  df-co 4380  df-dm 4381  df-rn 4382  df-res 4383  df-ima 4384  df-iota 4897  df-fun 4934  df-fn 4935  df-f 4936  df-fv 4940  df-ov 5546  df-oprab 5547  df-mpt2 5548  df-pnf 7217  df-mnf 7218  df-xr 7219  df-ltxr 7220  df-le 7221  df-neg 7349  df-z 8433  df-uz 8701  df-fz 9106
This theorem is referenced by: (None)
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