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Theorem ssenneg 11263
Description: Subsets of a class of a negative size (a degenerate case). Together with sshashneg 11264 this shows that sseqn 11262 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 9631 . . . . . . . 8  |-  ( N  e.  ZZ  ->  N  e.  RR )
21adantr 276 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  e.  RR )
3 0red 8321 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
0  e.  RR )
4 1red 8335 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
1  e.  RR )
5 simpr 110 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  <  0 )
6 0lt1 8447 . . . . . . . 8  |-  0  <  1
76a1i 9 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
0  <  1 )
82, 3, 4, 5, 7lttrd 8446 . . . . . 6  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  <  1 )
9 1z 9653 . . . . . . 7  |-  1  e.  ZZ
10 simpl 109 . . . . . . 7  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  N  e.  ZZ )
11 fzn 10429 . . . . . . 7  |-  ( ( 1  e.  ZZ  /\  N  e.  ZZ )  ->  ( N  <  1  <->  ( 1 ... N )  =  (/) ) )
129, 10, 11sylancr 418 . . . . . 6  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( N  <  1  <->  ( 1 ... N )  =  (/) ) )
138, 12mpbid 147 . . . . 5  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( 1 ... N
)  =  (/) )
1413breq2d 4140 . . . 4  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( x  ~~  (
1 ... N )  <->  x  ~~  (/) ) )
15 en0 7076 . . . 4  |-  ( x 
~~  (/)  <->  x  =  (/) )
1614, 15bitrdi 196 . . 3  |-  ( ( N  e.  ZZ  /\  N  <  0 )  -> 
( x  ~~  (
1 ... N )  <->  x  =  (/) ) )
1716rabbidv 2810 . 2  |-  ( ( N  e.  ZZ  /\  N  <  0 )  ->  { x  e.  ~P A  |  x  ~~  ( 1 ... N
) }  =  {
x  e.  ~P A  |  x  =  (/) } )
18 0elpw 4299 . . 3  |-  (/)  e.  ~P A
19 rabsn 3775 . . 3  |-  ( (/)  e.  ~P A  ->  { x  e.  ~P A  |  x  =  (/) }  =  { (/)
} )
2018, 19ax-mp 5 . 2  |-  { x  e.  ~P A  |  x  =  (/) }  =  { (/)
}
2117, 20eqtrdi 2287 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 1402    e. wcel 2209   {crab 2532   (/)c0 3520   ~Pcpw 3688   {csn 3708   class class class wbr 4128  (class class class)co 6079    ~~ cen 7014   RRcr 8172   0cc0 8173   1c1 8174    < clt 8354   ZZcz 9627   ...cfz 10394
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 4247  ax-nul 4257  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682  ax-cnex 8264  ax-resscn 8265  ax-1cn 8266  ax-1re 8267  ax-icn 8268  ax-addcl 8269  ax-addrcl 8270  ax-mulcl 8271  ax-addcom 8273  ax-addass 8275  ax-distr 8277  ax-i2m1 8278  ax-0lt1 8279  ax-0id 8281  ax-rnegex 8282  ax-cnre 8284  ax-pre-ltirr 8285  ax-pre-ltwlin 8286  ax-pre-lttrn 8287  ax-pre-ltadd 8289
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-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-int 3969  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-riota 6032  df-ov 6082  df-oprab 6083  df-mpo 6084  df-en 7017  df-pnf 8356  df-mnf 8357  df-xr 8358  df-ltxr 8359  df-le 8360  df-sub 8493  df-neg 8494  df-inn 9288  df-n0 9547  df-z 9628  df-uz 9905  df-fz 10395
This theorem is referenced by: (None)
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