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Metamath Proof Explorer
Theorem 1rp
Description: 1 is a positive real. (Contributed by Jeff Hankins, 23-Nov-2008)
|
|
Ref |
Expression |
|
Assertion |
1rp |
|- 1 e. RR+ |
Proof
| Step |
Hyp |
Ref |
Expression |
| 1 |
|
1re |
|- 1 e. RR |
| 2 |
|
0lt1 |
|- 0 < 1 |
| 3 |
1 2
|
elrpii |
|- 1 e. RR+ |