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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 12279 | . 2 class 7 | |
| 2 | c6 12278 | . . 3 class 6 | |
| 3 | c1 11076 | . . 3 class 1 | |
| 4 | caddc 11078 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7398 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1562 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12312 7re 12313 7cn 12314 7m1e6 12351 6p1e7 12367 4p3e7 12373 5p2e7 12375 6p2e8 12378 6lt7 12408 7p7e14 12774 8p7e15 12780 9p7e16 12787 9p8e17 12788 7t7e49 12809 8t7e56 12815 9t7e63 12822 2exp7 17125 7prm 17148 17prm 17155 37prm 17159 317prm 17164 log2ublem2 27014 log2ublem3 27015 bclbnd 27346 bposlem8 27357 lgsdir2lem3 27393 problem4 36023 3cubeslem3r 43273 rmydioph 43596 expdiophlem2 43604 fmtno5 48171 257prm 48175 127prm 48213 7odd 48339 stgoldbwt 48403 |
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