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Theorem 19.38 1662
Description: Theorem 19.38 of [Margaris] p. 90. (Contributed by NM, 12-Mar-1993.) Allow a shortening of 19.21t 1904 and 19.23t 1909. (Revised by Wolf Lammen, 2-Jan-2018.)
Assertion
Ref Expression
19.38

Proof of Theorem 19.38
StepHypRef Expression
1 alnex 1614 . . 3
2 pm2.21 108 . . . 4
32alimi 1633 . . 3
41, 3sylbir 213 . 2
5 ala1 1660 . 2
64, 5ja 161 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4  A.wal 1393  E.wex 1612
This theorem is referenced by:  19.21v  1729  19.23v  1760  19.21t  1904  19.23t  1909  pm10.53  31271  bj-19.21t  34403
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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