Theorem sonr 4414

Description: A strict order relation is irreflexive. (Contributed by NM, 24-Nov-1995.)

Assertion

Ref	Expression
sonr	|- ( ( R Or A /\ B e. A ) -> -. B R B )

Proof of Theorem sonr

Step	Hyp	Ref	Expression
1		sopo 4410	. 2 |- ( R Or A -> R Po A )
2		poirr 4404	. 2 |- ( ( R Po A /\ B e. A ) -> -. B R B )
3	1, 2	sylan 283	1 |- ( ( R Or A /\ B e. A ) -> -. B R B )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   e. wcel 2202   class class class wbr 4088   Po wpo 4391   Or wor 4392

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-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-v 2804  df-un 3204  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-po 4393  df-iso 4394

This theorem is referenced by:  sotricim  4420  sotritrieq  4422  soirri  5131  addnqprlemfl  7778  addnqprlemfu  7779  mulnqprlemfl  7794  mulnqprlemfu  7795  1ne0sr  7985