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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 12306 | . 2 class 7 | |
| 2 | c6 12305 | . . 3 class 6 | |
| 3 | c1 11107 | . . 3 class 1 | |
| 4 | caddc 11109 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7412 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1569 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is used by: 7nn 12339 7re 12340 7cn 12341 7m1e6 12378 6p1e7 12394 4p3e7 12400 5p2e7 12402 6p2e8 12405 6lt7 12435 7p7e14 12801 8p7e15 12807 9p7e16 12814 9p8e17 12815 7t7e49 12836 8t7e56 12842 9t7e63 12849 2exp7 17153 7prm 17176 17prm 17183 37prm 17187 317prm 17192 log2ublem2 27123 log2ublem3 27124 bclbnd 27455 bposlem8 27466 lgsdir2lem3 27502 problem4 36168 3cubeslem3r 43446 rmydioph 43769 expdiophlem2 43777 fmtno5 48337 257prm 48341 127prm 48379 7odd 48505 stgoldbwt 48569 |
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