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Mirrors > Home > MPE Home > Th. List > nn0addcld | Unicode version |
Description: Closure of addition of nonnegative integers, inference form. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
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nn0red.1 | |
nn0addcld.2 |
Ref | Expression |
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nn0addcld |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nn0red.1 | . 2 | |
2 | nn0addcld.2 | . 2 | |
3 | nn0addcl 10856 | . 2 | |
4 | 1, 2, 3 | syl2anc 661 | 1 |
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