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| Mirrors > Home > QLE Home > Th. List > df-le2 | Unicode version | ||
| Description: Define 'less than or equal to'. See df-le1 130 for the other direction. |
| Ref | Expression |
|---|---|
| df-le2.1 |
|
| Ref | Expression |
|---|---|
| df-le2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wva |
. . 3
| |
| 2 | wvb |
. . 3
| |
| 3 | 1, 2 | wo 6 |
. 2
|
| 4 | 3, 2 | wb 1 |
1
|
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