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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 12236 | . 2 class 7 | |
| 2 | c6 12235 | . . 3 class 6 | |
| 3 | c1 11035 | . . 3 class 1 | |
| 4 | caddc 11037 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7359 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1548 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12268 7re 12269 7cn 12270 7pos 12287 7m1e6 12303 6p1e7 12319 4p3e7 12325 5p2e7 12327 6p2e8 12330 6lt7 12357 7p7e14 12718 8p7e15 12724 9p7e16 12731 9p8e17 12732 7t7e49 12753 8t7e56 12759 9t7e63 12766 2exp7 17053 7prm 17076 17prm 17082 37prm 17086 317prm 17091 log2ublem2 26932 log2ublem3 26933 bclbnd 27264 bposlem8 27275 lgsdir2lem3 27311 problem4 35909 3cubeslem3r 43149 rmydioph 43472 expdiophlem2 43480 fmtno5 48047 257prm 48051 127prm 48089 7odd 48215 stgoldbwt 48279 |
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