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Theorem bdvsn 16237
Description: Equality of a setvar with a singleton of a setvar is a bounded formula. (Contributed by BJ, 16-Oct-2019.)
Assertion
Ref Expression
bdvsn  |- BOUNDED  x  =  {
y }
Distinct variable group:    x, y

Proof of Theorem bdvsn
StepHypRef Expression
1 bdcsn 16233 . . . 4  |- BOUNDED  { y }
21bdss 16227 . . 3  |- BOUNDED  x  C_  { y }
3 bdcv 16211 . . . 4  |- BOUNDED  x
43bdsnss 16236 . . 3  |- BOUNDED  { y }  C_  x
52, 4ax-bdan 16178 . 2  |- BOUNDED  ( x  C_  { y }  /\  { y }  C_  x )
6 eqss 3239 . 2  |-  ( x  =  { y }  <-> 
( x  C_  { y }  /\  { y }  C_  x )
)
75, 6bd0r 16188 1  |- BOUNDED  x  =  {
y }
Colors of variables: wff set class
Syntax hints:    /\ wa 104    = wceq 1395    C_ wss 3197   {csn 3666  BOUNDED wbd 16175
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-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-bd0 16176  ax-bdan 16178  ax-bdal 16181  ax-bdeq 16183  ax-bdel 16184  ax-bdsb 16185
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-v 2801  df-in 3203  df-ss 3210  df-sn 3672  df-bdc 16204
This theorem is referenced by:  bdop  16238
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