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| Mirrors > Home > MPE Home > Th. List > znegcld | Structured version Visualization version Unicode version | ||
| Description: Closure law for negative integers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| zred.1 |
|
| Ref | Expression |
|---|---|
| znegcld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zred.1 |
. 2
| |
| 2 | znegcl 11412 |
. 2
| |
| 3 | 1, 2 | syl 17 |
1
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