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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 9158 | . 2 class 3 | |
| 2 | c2 9157 | . . 3 class 2 | |
| 3 | c1 7996 | . . 3 class 1 | |
| 4 | caddc 7998 | . . 3 class + | |
| 5 | 2, 3, 4 | co 6000 | . 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 9180 3pos 9200 3m1e2 9226 2p2e4 9233 2p1e3 9240 3p3e6 9249 4p3e7 9251 5p3e8 9254 6p3e9 9257 3t3e9 9264 3nn 9269 2lt3 9277 7p3e10 9648 7p6e13 9651 8p3e11 9654 8p5e13 9656 9p3e12 9661 9p4e13 9662 4t3e12 9671 5t3e15 9674 6t3e18 9678 7t3e21 9683 8t3e24 9689 9t3e27 9696 nn01to3 9808 fztpval 10275 fz0to3un2pr 10315 fz0to4untppr 10316 fzo0to42pr 10421 cu2 10855 i3 10858 binom3 10874 fac3 10949 ege2le3 12177 ef4p 12200 cos1bnd 12265 3prm 12645 oddprmge3 12652 dveflem 15394 sincosq3sgn 15496 sincosq4sgn 15497 tangtx 15506 sincos6thpi 15510 binom4 15647 lgsdir2lem3 15703 |
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