Theorem nomcon4 297

Description: Lemma for "Non-Orthomodular Models..." paper.

Assertion

Ref	Expression
nomcon4	(a ==4 b) = (b_|_ ==3 a_|_)

Proof of Theorem nomcon4

Step	Hyp	Ref	Expression
1		nomcon1 294	. 2 (b ==1 a) = (a_|_ ==2 b_|_)
2		nomb41 291	. 2 (a ==4 b) = (b ==1 a)
3		nomb32 292	. 2 (b_|_ ==3 a_|_) = (a_|_ ==2 b_|_)
4	1, 2, 3	3tr1 60	1 (a ==4 b) = (b_|_ ==3 a_|_)

Syntax hints:   = wb 1  _|_wn 4   ==1 wid1 19   ==2 wid2 20   ==3 wid3 21   ==4 wid4 22

This theorem is referenced by:  nom54 327

This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37

This theorem depends on definitions:  df-a 39  df-id1 49  df-id2 50  df-id3 51  df-id4 52

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