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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 12327 | . 2 class 7 | |
| 2 | c6 12326 | . . 3 class 6 | |
| 3 | c1 11128 | . . 3 class 1 | |
| 4 | caddc 11130 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7416 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1570 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is used by: 7nn 12360 7re 12361 7cn 12362 7m1e6 12399 6p1e7 12415 4p3e7 12421 5p2e7 12423 6p2e8 12426 6lt7 12456 7p7e14 12823 8p7e15 12829 9p7e16 12836 9p8e17 12837 7t7e49 12858 8t7e56 12864 9t7e63 12871 2exp7 17183 7prm 17206 17prm 17213 37prm 17217 317prm 17222 log2ublem2 27182 log2ublem3 27183 bclbnd 27514 bposlem8 27525 lgsdir2lem3 27561 problem4 36234 1p7e8 43117 3cubeslem3r 43519 rmydioph 43842 expdiophlem2 43850 fmtno5 48447 257prm 48451 127prm 48489 7odd 48615 stgoldbwt 48679 |
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