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Theorem toponsspwpwg 12228
Description: The set of topologies on a set is included in the double power set of that set. (Contributed by BJ, 29-Apr-2021.) (Revised by Jim Kingdon, 16-Jan-2023.)
Assertion
Ref Expression
toponsspwpwg  |-  ( A  e.  V  ->  (TopOn `  A )  C_  ~P ~P A )

Proof of Theorem toponsspwpwg
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elex 2700 . . 3  |-  ( A  e.  V  ->  A  e.  _V )
2 rabssab 3189 . . . . . 6  |-  { y  e.  Top  |  A  =  U. y }  C_  { y  |  A  = 
U. y }
3 eqcom 2142 . . . . . . 7  |-  ( A  =  U. y  <->  U. y  =  A )
43abbii 2256 . . . . . 6  |-  { y  |  A  =  U. y }  =  {
y  |  U. y  =  A }
52, 4sseqtri 3136 . . . . 5  |-  { y  e.  Top  |  A  =  U. y }  C_  { y  |  U. y  =  A }
6 pwpwssunieq 3909 . . . . 5  |-  { y  |  U. y  =  A }  C_  ~P ~P A
75, 6sstri 3111 . . . 4  |-  { y  e.  Top  |  A  =  U. y }  C_  ~P ~P A
8 pwexg 4112 . . . . 5  |-  ( A  e.  V  ->  ~P A  e.  _V )
98pwexd 4113 . . . 4  |-  ( A  e.  V  ->  ~P ~P A  e.  _V )
10 ssexg 4075 . . . 4  |-  ( ( { y  e.  Top  |  A  =  U. y }  C_  ~P ~P A  /\  ~P ~P A  e. 
_V )  ->  { y  e.  Top  |  A  =  U. y }  e.  _V )
117, 9, 10sylancr 411 . . 3  |-  ( A  e.  V  ->  { y  e.  Top  |  A  =  U. y }  e.  _V )
12 eqeq1 2147 . . . . 5  |-  ( x  =  A  ->  (
x  =  U. y  <->  A  =  U. y ) )
1312rabbidv 2678 . . . 4  |-  ( x  =  A  ->  { y  e.  Top  |  x  =  U. y }  =  { y  e. 
Top  |  A  =  U. y } )
14 df-topon 12217 . . . 4  |- TopOn  =  ( x  e.  _V  |->  { y  e.  Top  |  x  =  U. y } )
1513, 14fvmptg 5505 . . 3  |-  ( ( A  e.  _V  /\  { y  e.  Top  |  A  =  U. y }  e.  _V )  ->  (TopOn `  A )  =  { y  e.  Top  |  A  =  U. y } )
161, 11, 15syl2anc 409 . 2  |-  ( A  e.  V  ->  (TopOn `  A )  =  {
y  e.  Top  |  A  =  U. y } )
1716, 7eqsstrdi 3154 1  |-  ( A  e.  V  ->  (TopOn `  A )  C_  ~P ~P A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1332    e. wcel 1481   {cab 2126   {crab 2421   _Vcvv 2689    C_ wss 3076   ~Pcpw 3515   U.cuni 3744   ` cfv 5131   Topctop 12203  TopOnctopon 12216
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-pow 4106  ax-pr 4139
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-rab 2426  df-v 2691  df-sbc 2914  df-un 3080  df-in 3082  df-ss 3089  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-uni 3745  df-br 3938  df-opab 3998  df-mpt 3999  df-id 4223  df-xp 4553  df-rel 4554  df-cnv 4555  df-co 4556  df-dm 4557  df-iota 5096  df-fun 5133  df-fv 5139  df-topon 12217
This theorem is referenced by: (None)
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