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Mirrors > Home > ILE Home > Th. List > zsubcld | Unicode version |
Description: Closure of subtraction of integers. (Contributed by Mario Carneiro, 28-May-2016.) |
Ref | Expression |
---|---|
zred.1 | |
zaddcld.1 |
Ref | Expression |
---|---|
zsubcld |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zred.1 | . 2 | |
2 | zaddcld.1 | . 2 | |
3 | zsubcl 9209 | . 2 | |
4 | 1, 2, 3 | syl2anc 409 | 1 |
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