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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 9061 | . 2 class 3 | |
| 2 | c2 9060 | . . 3 class 2 | |
| 3 | c1 7899 | . . 3 class 1 | |
| 4 | caddc 7901 | . . 3 class + | |
| 5 | 2, 3, 4 | co 5925 | . 2 class (2 + 1) |
| 6 | 1, 5 | wceq 1364 | 1 wff 3 = (2 + 1) |
| Colors of variables: wff set class |
| This definition is referenced by: 3re 9083 3pos 9103 3m1e2 9129 2p2e4 9136 2p1e3 9143 3p3e6 9152 4p3e7 9154 5p3e8 9157 6p3e9 9160 3t3e9 9167 3nn 9172 2lt3 9180 7p3e10 9550 7p6e13 9553 8p3e11 9556 8p5e13 9558 9p3e12 9563 9p4e13 9564 4t3e12 9573 5t3e15 9576 6t3e18 9580 7t3e21 9585 8t3e24 9591 9t3e27 9598 nn01to3 9710 fztpval 10177 fz0to3un2pr 10217 fz0to4untppr 10218 fzo0to42pr 10315 cu2 10749 i3 10752 binom3 10768 fac3 10843 ege2le3 11855 ef4p 11878 cos1bnd 11943 3prm 12323 oddprmge3 12330 dveflem 15070 sincosq3sgn 15172 sincosq4sgn 15173 tangtx 15182 sincos6thpi 15186 binom4 15323 lgsdir2lem3 15379 |
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