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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 12426 | . 2 class 7 | |
| 2 | c6 12425 | . . 3 class 6 | |
| 3 | c1 11225 | . . 3 class 1 | |
| 4 | caddc 11227 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7440 | . 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 12459 7re 12460 7cn 12461 7m1e6 12498 6p1e7 12514 4p3e7 12520 5p2e7 12522 6p2e8 12525 6lt7 12555 7p7e14 12922 8p7e15 12928 9p7e16 12935 9p8e17 12936 7t7e49 12957 8t7e56 12963 9t7e63 12970 2exp7 17291 7prm 17314 17prm 17321 37prm 17325 317prm 17330 log2ublem2 27302 log2ublem3 27303 bclbnd 27634 bposlem8 27645 lgsdir2lem3 27681 problem4 36599 1p7e8 43505 3cubeslem3r 43888 rmydioph 44212 expdiophlem2 44220 fmtno5 48845 257prm 48849 127prm 48887 7odd 49013 stgoldbwt 49077 |
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