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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 12253 | . 2 class 7 | |
| 2 | c6 12252 | . . 3 class 6 | |
| 3 | c1 11076 | . . 3 class 1 | |
| 4 | caddc 11078 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7390 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1540 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12285 7re 12286 7cn 12287 7pos 12304 7m1e6 12320 6p1e7 12336 4p3e7 12342 5p2e7 12344 6p2e8 12347 6lt7 12374 7p7e14 12735 8p7e15 12741 9p7e16 12748 9p8e17 12749 7t7e49 12770 8t7e56 12776 9t7e63 12783 2exp7 17065 7prm 17088 17prm 17094 37prm 17098 317prm 17103 log2ublem2 26864 log2ublem3 26865 bclbnd 27198 bposlem8 27209 lgsdir2lem3 27245 problem4 35662 3cubeslem3r 42682 rmydioph 43010 expdiophlem2 43018 fmtno5 47562 257prm 47566 127prm 47604 7odd 47717 stgoldbwt 47781 |
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