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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 12230 | . 2 class 7 | |
| 2 | c6 12229 | . . 3 class 6 | |
| 3 | c1 11028 | . . 3 class 1 | |
| 4 | caddc 11030 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7356 | . 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 12262 7re 12263 7cn 12264 7pos 12281 7m1e6 12297 6p1e7 12313 4p3e7 12319 5p2e7 12321 6p2e8 12324 6lt7 12351 7p7e14 12712 8p7e15 12718 9p7e16 12725 9p8e17 12726 7t7e49 12747 8t7e56 12753 9t7e63 12760 2exp7 17047 7prm 17070 17prm 17076 37prm 17080 317prm 17085 log2ublem2 26899 log2ublem3 26900 bclbnd 27231 bposlem8 27242 lgsdir2lem3 27278 problem4 35838 3cubeslem3r 43107 rmydioph 43430 expdiophlem2 43438 fmtno5 48008 257prm 48012 127prm 48050 7odd 48176 stgoldbwt 48240 |
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