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