Description: Lemma for jm2.26 . (Contributed by Stefan O'Rear, 2-Oct-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | jm2.25lem1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl1l | |
|
2 | simpl2l | |
|
3 | simpl2r | |
|
4 | simpl1r | |
|
5 | simpl3 | |
|
6 | simpr | |
|
7 | acongtr | |
|
8 | 1 2 3 4 5 6 7 | syl222anc | |
9 | simpl1l | |
|
10 | simpl2r | |
|
11 | simpl2l | |
|
12 | simpl1r | |
|
13 | simpl3 | |
|
14 | acongsym | |
|
15 | 9 11 10 13 14 | syl31anc | |
16 | simpr | |
|
17 | acongtr | |
|
18 | 9 10 11 12 15 16 17 | syl222anc | |
19 | 8 18 | impbida | |