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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 12371 | . 2 class 7 | |
| 2 | c6 12370 | . . 3 class 6 | |
| 3 | c1 11172 | . . 3 class 1 | |
| 4 | caddc 11174 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7408 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1570 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is used by: 7nn 12404 7re 12405 7cn 12406 7m1e6 12443 6p1e7 12459 4p3e7 12465 5p2e7 12467 6p2e8 12470 6lt7 12500 7p7e14 12867 8p7e15 12873 9p7e16 12880 9p8e17 12881 7t7e49 12902 8t7e56 12908 9t7e63 12915 2exp7 17226 7prm 17249 17prm 17256 37prm 17260 317prm 17265 log2ublem2 27238 log2ublem3 27239 bclbnd 27570 bposlem8 27581 lgsdir2lem3 27617 problem4 36354 1p7e8 43234 3cubeslem3r 43636 rmydioph 43959 expdiophlem2 43967 fmtno5 48564 257prm 48568 127prm 48606 7odd 48732 stgoldbwt 48796 |
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