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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 7280 | . 2 | |
2 | niex 7244 | . . . 4 | |
3 | 2, 2 | xpex 4713 | . . 3 |
4 | 3 | qsex 6549 | . 2 |
5 | 1, 4 | eqeltri 2237 | 1 |
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