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Mirrors > Home > QLE Home > Th. List > oa4lem1 | Unicode version |
Description: Lemma for 3-var to 4-var OA. |
Ref | Expression |
---|---|
oa4lem1.1 | |
oa4lem1.2 |
Ref | Expression |
---|---|
oa4lem1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | leo 158 | . . . . 5 | |
2 | ax-a1 30 | . . . . 5 | |
3 | 1, 2 | lbtr 139 | . . . 4 |
4 | oa4lem1.1 | . . . 4 | |
5 | 3, 4 | ler2an 173 | . . 3 |
6 | 5 | lelor 166 | . 2 |
7 | ax-a2 31 | . 2 | |
8 | df-i2 45 | . 2 | |
9 | 6, 7, 8 | le3tr1 140 | 1 |
Colors of variables: term |
Syntax hints: wle 2 wn 4 wo 6 wa 7 wi2 13 |
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-i2 45 df-le1 130 df-le2 131 |
This theorem is referenced by: oa4lem3 939 |
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