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Theorem str 189

Description: Strengthening rule.

Hypotheses

Ref	Expression
str.1
str.2

Assertion

Ref	Expression
str

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Proof of Theorem str

Step	Hyp	Ref	Expression
1		id 59	. . . 4
2	1	bile 142	. . 3
3		str.1	. . 3
4	2, 3	ler2an 173	. 2
5		str.2	. 2
6	4, 5	letr 137	1

Colors of variables: term

Syntax hints:   wle 2   wo 6   wa 7

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

This theorem depends on definitions:  df-a 40  df-t 41  df-f 42  df-le1 130  df-le2 131

This theorem is referenced by: (None)

Copyright terms: Public domain

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