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| Mirrors > Home > MPE Home > Th. List > nn0addcld | Structured version Visualization version Unicode version | ||
| Description: Closure of addition of nonnegative integers, inference form. (Contributed by Mario Carneiro, 27-May-2016.) |
| Ref | Expression |
|---|---|
| nn0red.1 |
|
| nn0addcld.2 |
|
| Ref | Expression |
|---|---|
| nn0addcld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0red.1 |
. 2
| |
| 2 | nn0addcld.2 |
. 2
| |
| 3 | nn0addcl 11328 |
. 2
| |
| 4 | 1, 2, 3 | syl2anc 693 |
1
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