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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 12185 | . 2 class 7 | |
| 2 | c6 12184 | . . 3 class 6 | |
| 3 | c1 11007 | . . 3 class 1 | |
| 4 | caddc 11009 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7346 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1541 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12217 7re 12218 7cn 12219 7pos 12236 7m1e6 12252 6p1e7 12268 4p3e7 12274 5p2e7 12276 6p2e8 12279 6lt7 12306 7p7e14 12667 8p7e15 12673 9p7e16 12680 9p8e17 12681 7t7e49 12702 8t7e56 12708 9t7e63 12715 2exp7 16999 7prm 17022 17prm 17028 37prm 17032 317prm 17037 log2ublem2 26884 log2ublem3 26885 bclbnd 27218 bposlem8 27229 lgsdir2lem3 27265 problem4 35712 3cubeslem3r 42790 rmydioph 43117 expdiophlem2 43125 fmtno5 47667 257prm 47671 127prm 47709 7odd 47822 stgoldbwt 47886 |
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