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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 12219 | . 2 class 7 | |
| 2 | c6 12218 | . . 3 class 6 | |
| 3 | c1 11041 | . . 3 class 1 | |
| 4 | caddc 11043 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7370 | . 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 12251 7re 12252 7cn 12253 7pos 12270 7m1e6 12286 6p1e7 12302 4p3e7 12308 5p2e7 12310 6p2e8 12313 6lt7 12340 7p7e14 12700 8p7e15 12706 9p7e16 12713 9p8e17 12714 7t7e49 12735 8t7e56 12741 9t7e63 12748 2exp7 17029 7prm 17052 17prm 17058 37prm 17062 317prm 17067 log2ublem2 26930 log2ublem3 26931 bclbnd 27264 bposlem8 27275 lgsdir2lem3 27311 problem4 35890 3cubeslem3r 43073 rmydioph 43400 expdiophlem2 43408 fmtno5 47946 257prm 47950 127prm 47988 7odd 48101 stgoldbwt 48165 |
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