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Definition df-id4 53
Description: Define asymmetrical identity (for "Non-Orthomodular Models..." paper).
Assertion
Ref Expression
df-id4 (a ==4 b) = ((a' v b) ^ (b' v (a ^ b)))
Detailed syntax breakdown of Definition df-id4
StepHypRef Expression
1 wva . . 3 term a
2 wvb . . 3 term b
31, 2wid4 21 . 2 term (a ==4 b)
41wn 4 . . . 4 term a'
54, 2wo 6 . . 3 term (a' v b)
62wn 4 . . . 4 term b'
71, 2wa 7 . . . 4 term (a ^ b)
86, 7wo 6 . . 3 term (b' v (a ^ b))
95, 8wa 7 . 2 term ((a' v b) ^ (b' v (a ^ b)))
103, 9wb 1 1 wff (a ==4 b) = ((a' v b) ^ (b' v (a ^ b)))
Colors of variables: term
This definition is referenced by:  nomb41  299  nom24  317  nom53  334  lem3.3.7i4e1  1069  lem3.3.7i4e2  1070  wdid0id4  1113
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