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| Mirrors > Home > ILE Home > Th. List > df-3 | GIF version | ||
| Description: Define the number 3. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| df-3 | ⊢ 3 = (2 + 1) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | c3 9173 | . 2 class 3 | |
| 2 | c2 9172 | . . 3 class 2 | |
| 3 | c1 8011 | . . 3 class 1 | |
| 4 | caddc 8013 | . . 3 class + | |
| 5 | 2, 3, 4 | co 6007 | . 2 class (2 + 1) |
| 6 | 1, 5 | wceq 1395 | 1 wff 3 = (2 + 1) |
| Colors of variables: wff set class |
| This definition is referenced by: 3re 9195 3pos 9215 3m1e2 9241 2p2e4 9248 2p1e3 9255 3p3e6 9264 4p3e7 9266 5p3e8 9269 6p3e9 9272 3t3e9 9279 3nn 9284 2lt3 9292 7p3e10 9663 7p6e13 9666 8p3e11 9669 8p5e13 9671 9p3e12 9676 9p4e13 9677 4t3e12 9686 5t3e15 9689 6t3e18 9693 7t3e21 9698 8t3e24 9704 9t3e27 9711 nn01to3 9824 fztpval 10291 fz0to3un2pr 10331 fz0to4untppr 10332 fzo0to42pr 10438 cu2 10872 i3 10875 binom3 10891 fac3 10966 ege2le3 12197 ef4p 12220 cos1bnd 12285 3prm 12665 oddprmge3 12672 dveflem 15415 sincosq3sgn 15517 sincosq4sgn 15518 tangtx 15527 sincos6thpi 15531 binom4 15668 lgsdir2lem3 15724 |
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