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Theorem ssenneg 11197
Description: Subsets of a class of a negative size (a degenerate case). Together with sshashneg 11198 this shows that sseqn 11196 could not be extended beyond  N  e.  NN0. (Contributed by Jim Kingdon, 22-May-2026.)
Assertion
Ref Expression
ssenneg  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  { x  e.  ~P A  |  x  ~~  ( 1 ... N
) }  =  { (/)
} )
Distinct variable groups:    x, N    x, A

Proof of Theorem ssenneg
StepHypRef Expression
1 zre 9577 . . . . . . . 8  |-  ( N  e.  ZZ  ->  N  e.  RR )
21adantr 276 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  e.  RR )
3 0red 8271 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
0  e.  RR )
4 1red 8285 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
1  e.  RR )
5 simpr 110 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  <  0 )
6 0lt1 8396 . . . . . . . 8  |-  0  <  1
76a1i 9 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
0  <  1 )
82, 3, 4, 5, 7lttrd 8395 . . . . . 6  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  <  1 )
9 1z 9599 . . . . . . 7  |-  1  e.  ZZ
10 simpl 109 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  e.  ZZ )
11 fzn 10372 . . . . . . 7  |-  ( ( 1  e.  ZZ  /\  N  e.  ZZ )  ->  ( N  <  1  <->  ( 1 ... N )  =  (/) ) )
129, 10, 11sylancr 414 . . . . . 6  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( N  <  1  <->  ( 1 ... N )  =  (/) ) )
138, 12mpbid 147 . . . . 5  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( 1 ... N
)  =  (/) )
1413breq2d 4120 . . . 4  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( x  ~~  (
1 ... N )  <->  x  ~~  (/) ) )
15 en0 7034 . . . 4  |-  ( x 
~~  (/)  <->  x  =  (/) )
1614, 15bitrdi 196 . . 3  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( x  ~~  (
1 ... N )  <->  x  =  (/) ) )
1716rabbidv 2801 . 2  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  { x  e.  ~P A  |  x  ~~  ( 1 ... N
) }  =  {
x  e.  ~P A  |  x  =  (/) } )
18 0elpw 4276 . . 3  |-  (/)  e.  ~P A
19 rabsn 3755 . . 3  |-  ( (/)  e.  ~P A  ->  { x  e.  ~P A  |  x  =  (/) }  =  { (/)
} )
2018, 19ax-mp 5 . 2  |-  { x  e.  ~P A  |  x  =  (/) }  =  { (/)
}
2117, 20eqtrdi 2281 1  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  { x  e.  ~P A  |  x  ~~  ( 1 ... N
) }  =  { (/)
} )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1398    e. wcel 2203   {crab 2524   (/)c0 3507   ~Pcpw 3668   {csn 3688   class class class wbr 4108  (class class class)co 6049    ~~ cen 6972   RRcr 8122   0cc0 8123   1c1 8124    < clt 8304   ZZcz 9573   ...cfz 10338
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 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-cnex 8214  ax-resscn 8215  ax-1cn 8216  ax-1re 8217  ax-icn 8218  ax-addcl 8219  ax-addrcl 8220  ax-mulcl 8221  ax-addcom 8223  ax-addass 8225  ax-distr 8227  ax-i2m1 8228  ax-0lt1 8229  ax-0id 8231  ax-rnegex 8232  ax-cnre 8234  ax-pre-ltirr 8235  ax-pre-ltwlin 8236  ax-pre-lttrn 8237  ax-pre-ltadd 8239
This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2814  df-sbc 3042  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-br 4109  df-opab 4171  df-mpt 4172  df-id 4413  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-en 6975  df-pnf 8306  df-mnf 8307  df-xr 8308  df-ltxr 8309  df-le 8310  df-sub 8442  df-neg 8443  df-inn 9234  df-n0 9493  df-z 9574  df-uz 9850  df-fz 10339
This theorem is referenced by: (None)
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