This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Metamath Proof Explorer
Description: The positive reals form a set. (Contributed by Glauco Siliprandi, 11-Oct-2020)
|
|
Ref |
Expression |
|
Assertion |
rpex |
|- RR+ e. _V |
Proof
| Step |
Hyp |
Ref |
Expression |
| 1 |
|
reex |
|- RR e. _V |
| 2 |
|
rpssre |
|- RR+ C_ RR |
| 3 |
1 2
|
ssexi |
|- RR+ e. _V |