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Theorem relsnopg 4638
Description: A singleton of an ordered pair is a relation. (Contributed by NM, 17-May-1998.) (Revised by BJ, 12-Feb-2022.)
Assertion
Ref Expression
relsnopg  |-  ( ( A  e.  V  /\  B  e.  W )  ->  Rel  { <. A ,  B >. } )

Proof of Theorem relsnopg
StepHypRef Expression
1 opelvvg 4583 . 2  |-  ( ( A  e.  V  /\  B  e.  W )  -> 
<. A ,  B >.  e.  ( _V  X.  _V ) )
2 opexg 4145 . . 3  |-  ( ( A  e.  V  /\  B  e.  W )  -> 
<. A ,  B >.  e. 
_V )
3 relsng 4637 . . 3  |-  ( <. A ,  B >.  e. 
_V  ->  ( Rel  { <. A ,  B >. }  <->  <. A ,  B >.  e.  ( _V  X.  _V ) ) )
42, 3syl 14 . 2  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( Rel  { <. A ,  B >. }  <->  <. A ,  B >.  e.  ( _V 
X.  _V ) ) )
51, 4mpbird 166 1  |-  ( ( A  e.  V  /\  B  e.  W )  ->  Rel  { <. A ,  B >. } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    e. wcel 1480   _Vcvv 2681   {csn 3522   <.cop 3525    X. cxp 4532   Rel wrel 4539
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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-opab 3985  df-xp 4540  df-rel 4541
This theorem is referenced by: (None)
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