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| Mirrors > Home > ILE Home > Th. List > zmulcld | Unicode version | ||
| Description: Closure of multiplication of integers. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| zred.1 |
|
| zaddcld.1 |
|
| Ref | Expression |
|---|---|
| zmulcld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zred.1 |
. 2
| |
| 2 | zaddcld.1 |
. 2
| |
| 3 | zmulcl 9379 |
. 2
| |
| 4 | 1, 2, 3 | syl2anc 411 |
1
|
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