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Theorem otexg 4316
Description: An ordered triple of sets is a set. (Contributed by Jim Kingdon, 19-Sep-2018.)
Assertion
Ref Expression
otexg  |-  ( ( A  e.  U  /\  B  e.  V  /\  C  e.  W )  -> 
<. A ,  B ,  C >.  e.  _V )

Proof of Theorem otexg
StepHypRef Expression
1 df-ot 3676 . . 3  |-  <. A ,  B ,  C >.  = 
<. <. A ,  B >. ,  C >.
2 opexg 4314 . . . 4  |-  ( ( A  e.  U  /\  B  e.  V )  -> 
<. A ,  B >.  e. 
_V )
3 opexg 4314 . . . 4  |-  ( (
<. A ,  B >.  e. 
_V  /\  C  e.  W )  ->  <. <. A ,  B >. ,  C >.  e. 
_V )
42, 3sylan 283 . . 3  |-  ( ( ( A  e.  U  /\  B  e.  V
)  /\  C  e.  W )  ->  <. <. A ,  B >. ,  C >.  e. 
_V )
51, 4eqeltrid 2316 . 2  |-  ( ( ( A  e.  U  /\  B  e.  V
)  /\  C  e.  W )  ->  <. A ,  B ,  C >.  e. 
_V )
653impa 1218 1  |-  ( ( A  e.  U  /\  B  e.  V  /\  C  e.  W )  -> 
<. A ,  B ,  C >.  e.  _V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    /\ w3a 1002    e. wcel 2200   _Vcvv 2799   <.cop 3669   <.cotp 3670
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-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-ot 3676
This theorem is referenced by:  euotd  4341
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