Theorem ud3lem0b 261

Description: Introduce Kalmbach implication to the right. (Contributed by NM, 23-Nov-1997.)

Hypothesis

Ref	Expression
ud3lem0a.1	a = b

Assertion

Ref	Expression
ud3lem0b	(a →3 c) = (b →3 c)

Proof of Theorem ud3lem0b

Step	Hyp	Ref	Expression
1		ud3lem0a.1	. 2 a = b
2	1	ri3 253	1 (a →3 c) = (b →3 c)

Syntax hints:   = wb 1   →₃ wi3 14

This theorem was proved from axioms:  ax-a2 31  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38

This theorem depends on definitions:  df-a 40  df-i3 46

This theorem is referenced by:  ud3lem2  571  ud3  597