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Theorem 19.2 1526
Description: Theorem 19.2 of [Margaris] p. 89, generalized to use two setvar variables. (Contributed by O'Cat, 31-Mar-2008.)
Assertion
Ref Expression
19.2 (xφyφ)

Proof of Theorem 19.2
StepHypRef Expression
1 19.8a 1479 . 2 (φyφ)
21sps 1427 1 (xφyφ)
Colors of variables: wff set class
Syntax hints:  wi 4  wal 1240  wex 1378
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-4 1397
This theorem depends on definitions:  df-bi 110
This theorem is referenced by:  i19.24  1527  i19.39  1528  19.34  1571  eusv2i  4153
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