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| Mirrors > Home > MPE Home > Th. List > subidd | Structured version Visualization version Unicode version | ||
| Description: Subtraction of a number from itself. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| negidd.1 |
|
| Ref | Expression |
|---|---|
| subidd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | negidd.1 |
. 2
| |
| 2 | subid 10300 |
. 2
| |
| 3 | 1, 2 | syl 17 |
1
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