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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 12203 | . 2 class 7 | |
| 2 | c6 12202 | . . 3 class 6 | |
| 3 | c1 11025 | . . 3 class 1 | |
| 4 | caddc 11027 | . . 3 class + | |
| 5 | 2, 3, 4 | co 7356 | . 2 class (6 + 1) |
| 6 | 1, 5 | wceq 1541 | 1 wff 7 = (6 + 1) |
| Colors of variables: wff setvar class |
| This definition is referenced by: 7nn 12235 7re 12236 7cn 12237 7pos 12254 7m1e6 12270 6p1e7 12286 4p3e7 12292 5p2e7 12294 6p2e8 12297 6lt7 12324 7p7e14 12684 8p7e15 12690 9p7e16 12697 9p8e17 12698 7t7e49 12719 8t7e56 12725 9t7e63 12732 2exp7 17013 7prm 17036 17prm 17042 37prm 17046 317prm 17051 log2ublem2 26911 log2ublem3 26912 bclbnd 27245 bposlem8 27256 lgsdir2lem3 27292 problem4 35811 3cubeslem3r 42871 rmydioph 43198 expdiophlem2 43206 fmtno5 47745 257prm 47749 127prm 47787 7odd 47900 stgoldbwt 47964 |
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