Theorem bina4 277

Description: Pavicic binary logic ax-a4 analog.

Assertion

Ref	Expression
bina4	(b ->3 (a v b)) = 1

Proof of Theorem bina4

Step	Hyp	Ref	Expression
1		leo 150	. . 3 b =< (b v a)
2		ax-a2 30	. . 3 (b v a) = (a v b)
3	1, 2	lbtr 131	. 2 b =< (a v b)
4	3	lei3 238	1 (b ->3 (a v b)) = 1

Syntax hints:   = wb 1   v wo 6  1wt 9   ->3 wi3 15

This theorem is referenced by:  i3ror 514  i3th2 526

This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-a3 31  ax-a4 32  ax-a5 33  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37

This theorem depends on definitions:  df-a 39  df-t 40  df-f 41  df-i3 45  df-le1 122  df-le2 123

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