Theorem u3lemc1 682

Description: Commutation theorem for Kalmbach implication.

Assertion

Ref	Expression
u3lemc1	a C (a →3 b)

Proof of Theorem u3lemc1

Step	Hyp	Ref	Expression
1		comi31 508	1 a C (a →3 b)

Syntax hints:   C wc 3   →₃ wi3 14

This theorem was proved from axioms:  ax-a1 30  ax-a2 31  ax-a3 32  ax-a4 33  ax-a5 34  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38  ax-r3 439

This theorem depends on definitions:  df-b 39  df-a 40  df-t 41  df-f 42  df-i3 46  df-le1 130  df-le2 131  df-c1 132  df-c2 133

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