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| Mirrors > Home > MPE Home > Th. List > df-7 | Structured version Visualization version GIF version | ||
| Description: Define the number 7. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| df-7 | ⊢ 7 = (6 + 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c7 12209 | . 2 class 7 | |
| 2 | c6 12208 | . . 3 class 6 | |
| 3 | c1 11031 | . . 3 class 1 | |
| 4 | caddc 11033 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7360 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1542 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12241 7re 12242 7cn 12243 7pos 12260 7m1e6 12276 6p1e7 12292 4p3e7 12298 5p2e7 12300 6p2e8 12303 6lt7 12330 7p7e14 12690 8p7e15 12696 9p7e16 12703 9p8e17 12704 7t7e49 12725 8t7e56 12731 9t7e63 12738 2exp7 17019 7prm 17042 17prm 17048 37prm 17052 317prm 17057 log2ublem2 26917 log2ublem3 26918 bclbnd 27251 bposlem8 27262 lgsdir2lem3 27298 problem4 35864 3cubeslem3r 42996 rmydioph 43323 expdiophlem2 43331 fmtno5 47870 257prm 47874 127prm 47912 7odd 48025 stgoldbwt 48089 |
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