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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 12191 | . 2 class 7 | |
| 2 | c6 12190 | . . 3 class 6 | |
| 3 | c1 11013 | . . 3 class 1 | |
| 4 | caddc 11015 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7352 | . 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 12223 7re 12224 7cn 12225 7pos 12242 7m1e6 12258 6p1e7 12274 4p3e7 12280 5p2e7 12282 6p2e8 12285 6lt7 12312 7p7e14 12673 8p7e15 12679 9p7e16 12686 9p8e17 12687 7t7e49 12708 8t7e56 12714 9t7e63 12721 2exp7 17005 7prm 17028 17prm 17034 37prm 17038 317prm 17043 log2ublem2 26890 log2ublem3 26891 bclbnd 27224 bposlem8 27235 lgsdir2lem3 27271 problem4 35719 3cubeslem3r 42785 rmydioph 43112 expdiophlem2 43120 fmtno5 47662 257prm 47666 127prm 47704 7odd 47817 stgoldbwt 47881 |
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