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| Mirrors > Home > MPE Home > Th. List > df-neg | Structured version Visualization version Unicode version | ||
| Description: Define the negative of a
number (unary minus). We use different symbols
for unary minus ( |
| Ref | Expression |
|---|---|
| df-neg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cA |
. . 3
| |
| 2 | 1 | cneg 10267 |
. 2
|
| 3 | cc0 9936 |
. . 3
| |
| 4 | cmin 10266 |
. . 3
| |
| 5 | 3, 1, 4 | co 6650 |
. 2
|
| 6 | 2, 5 | wceq 1483 |
1
|
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