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Metamath Proof Explorer
Description: A nonnegative integer is a real number. (Contributed by NM, 14-May-2003)
|
|
Ref |
Expression |
|
Hypothesis |
nn0rei.1 |
|- A e. NN0 |
|
Assertion |
nn0rei |
|- A e. RR |
Proof
| Step |
Hyp |
Ref |
Expression |
| 1 |
|
nn0rei.1 |
|- A e. NN0 |
| 2 |
|
nn0ssre |
|- NN0 C_ RR |
| 3 |
2 1
|
sselii |
|- A e. RR |