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Mirrors > Home > ILE Home > Th. List > df-9 | Unicode version |
Description: Define the number 9. (Contributed by NM, 27-May-1999.) |
Ref | Expression |
---|---|
df-9 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c9 8746 | . 2 | |
2 | c8 8745 | . . 3 | |
3 | c1 7589 | . . 3 | |
4 | caddc 7591 | . . 3 | |
5 | 2, 3, 4 | co 5742 | . 2 |
6 | 1, 5 | wceq 1316 | 1 |
Colors of variables: wff set class |
This definition is referenced by: 9re 8775 9pos 8792 9m1e8 8814 8p1e9 8828 5p4e9 8836 6p3e9 8838 7p2e9 8839 9nn 8856 8lt9 8885 8p2e10 9229 9p9e18 9243 9t9e81 9278 |
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