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Theorem pm5.61 712
Description: Theorem *5.61 of [WhiteheadRussell] p. 125. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 30-Jun-2013.)
Assertion
Ref Expression
pm5.61

Proof of Theorem pm5.61
StepHypRef Expression
1 biorf 405 . . 3
2 orcom 387 . . 3
31, 2syl6rbb 262 . 2
43pm5.32ri 638 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  \/wo 368  /\wa 369
This theorem is referenced by:  pm5.75  937  xrnemnf  11357  xrnepnf  11358  hashinfxadd  12453  limcdif  22280  ellimc2  22281  limcmpt  22287  limcres  22290  tglineeltr  24011  tltnle  27650  xrlttri5d  31465
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371
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