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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 12238 | . 2 class 7 | |
| 2 | c6 12237 | . . 3 class 6 | |
| 3 | c1 11036 | . . 3 class 1 | |
| 4 | caddc 11038 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7364 | . 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 12270 7re 12271 7cn 12272 7pos 12289 7m1e6 12305 6p1e7 12321 4p3e7 12327 5p2e7 12329 6p2e8 12332 6lt7 12359 7p7e14 12720 8p7e15 12726 9p7e16 12733 9p8e17 12734 7t7e49 12755 8t7e56 12761 9t7e63 12768 2exp7 17055 7prm 17078 17prm 17084 37prm 17088 317prm 17093 log2ublem2 26908 log2ublem3 26909 bclbnd 27240 bposlem8 27251 lgsdir2lem3 27287 problem4 35847 3cubeslem3r 43116 rmydioph 43439 expdiophlem2 43447 fmtno5 48011 257prm 48015 127prm 48053 7odd 48179 stgoldbwt 48243 |
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