Theorem poleloe 5143

Description: Express "less than or equals" for general strict orders. (Contributed by Stefan O'Rear, 17-Jan-2015.)

Assertion

Ref	Expression
poleloe	|- ( B e. V -> ( A ( R u. _I ) B <-> ( A R B \/ A = B ) ) )

Proof of Theorem poleloe

Step	Hyp	Ref	Expression
1		brun 4145	. 2 |- ( A ( R u. _I ) B <-> ( A R B \/ A _I B ) )
2		ideqg 4887	. . 3 |- ( B e. V -> ( A _I B <-> A = B ) )
3	2	orbi2d 798	. 2 |- ( B e. V -> ( ( A R B \/ A _I B ) <-> ( A R B \/ A = B ) ) )
4	1, 3	bitrid 192	1 |- ( B e. V -> ( A ( R u. _I ) B <-> ( A R B \/ A = B ) ) )

Syntax hints:   -> wi 4   <-> wb 105   \/ wo 716   = wceq 1398   e. wcel 2202   u. cun 3199   class class class wbr 4093   _I cid 4391

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-br 4094  df-opab 4156  df-id 4396  df-xp 4737  df-rel 4738

This theorem is referenced by:  poltletr  5144