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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 12222 | . 2 class 7 | |
| 2 | c6 12221 | . . 3 class 6 | |
| 3 | c1 11045 | . . 3 class 1 | |
| 4 | caddc 11047 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7369 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1540 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12254 7re 12255 7cn 12256 7pos 12273 7m1e6 12289 6p1e7 12305 4p3e7 12311 5p2e7 12313 6p2e8 12316 6lt7 12343 7p7e14 12704 8p7e15 12710 9p7e16 12717 9p8e17 12718 7t7e49 12739 8t7e56 12745 9t7e63 12752 2exp7 17034 7prm 17057 17prm 17063 37prm 17067 317prm 17072 log2ublem2 26833 log2ublem3 26834 bclbnd 27167 bposlem8 27178 lgsdir2lem3 27214 problem4 35628 3cubeslem3r 42648 rmydioph 42976 expdiophlem2 42984 fmtno5 47531 257prm 47535 127prm 47573 7odd 47686 stgoldbwt 47750 |
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