Theorem ud3lem0b 253

Description: Introduce Kalmbach implication to the right.

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 245	1 (a →3 c) = (b →3 c)

Syntax hints:   = wb 1   →₃ wi3 15

This theorem is referenced by:  ud3lem2 553  ud3 579

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

This theorem depends on definitions:  df-a 39  df-i3 45

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