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Theorem 2nexaln 1651
Description: Theorem *11.25 in [WhiteheadRussell] p. 160. (Contributed by Andrew Salmon, 24-May-2011.)
Assertion
Ref Expression
2nexaln

Proof of Theorem 2nexaln
StepHypRef Expression
1 2exnaln 1650 . . 3
21bicomi 202 . 2
32con1bii 331 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  A.wal 1393  E.wex 1612
This theorem is referenced by:  2mo  2373  2moOLD  2374  swrd0  12658  2spotdisj  25061  pm11.63  31301
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631
This theorem depends on definitions:  df-bi 185  df-ex 1613
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