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| Mirrors > Home > ILE Home > Th. List > nqex | Unicode version | ||
| Description: The class of positive fractions exists. (Contributed by NM, 16-Aug-1995.) (Revised by Mario Carneiro, 27-Apr-2013.) | 
| Ref | Expression | 
|---|---|
| nqex | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | df-nqqs 7415 | 
. 2
 | |
| 2 | niex 7379 | 
. . . 4
 | |
| 3 | 2, 2 | xpex 4778 | 
. . 3
 | 
| 4 | 3 | qsex 6651 | 
. 2
 | 
| 5 | 1, 4 | eqeltri 2269 | 
1
 | 
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