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Description: Finite sets of sequential nonnegative integers starting with 0 are subsets of NN0. (Contributed by JJ, 1-Jun-2021)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | fz0ssnn0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elfznn0 | ||
| 2 | 1 | ssriv |