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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 12402 | . 2 class 7 | |
| 2 | c6 12401 | . . 3 class 6 | |
| 3 | c1 11201 | . . 3 class 1 | |
| 4 | caddc 11203 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7420 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1569 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is used by: 7nn 12435 7re 12436 7cn 12437 7m1e6 12474 6p1e7 12490 4p3e7 12496 5p2e7 12498 6p2e8 12501 6lt7 12531 7p7e14 12898 8p7e15 12904 9p7e16 12911 9p8e17 12912 7t7e49 12933 8t7e56 12939 9t7e63 12946 2exp7 17265 7prm 17288 17prm 17295 37prm 17299 317prm 17304 log2ublem2 27275 log2ublem3 27276 bclbnd 27607 bposlem8 27618 lgsdir2lem3 27654 problem4 36433 1p7e8 43315 3cubeslem3r 43698 rmydioph 44021 expdiophlem2 44029 fmtno5 48642 257prm 48646 127prm 48684 7odd 48810 stgoldbwt 48874 |
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