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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 8970 | . 2 class 3 | |
2 | c2 8969 | . . 3 class 2 | |
3 | c1 7811 | . . 3 class 1 | |
4 | caddc 7813 | . . 3 class + | |
5 | 2, 3, 4 | co 5874 | . 2 class (2 + 1) |
6 | 1, 5 | wceq 1353 | 1 wff 3 = (2 + 1) |
Colors of variables: wff set class |
This definition is referenced by: 3re 8992 3pos 9012 3m1e2 9038 2p2e4 9045 2p1e3 9051 3p3e6 9060 4p3e7 9062 5p3e8 9065 6p3e9 9068 3t3e9 9075 3nn 9080 2lt3 9088 7p3e10 9457 7p6e13 9460 8p3e11 9463 8p5e13 9465 9p3e12 9470 9p4e13 9471 4t3e12 9480 5t3e15 9483 6t3e18 9487 7t3e21 9492 8t3e24 9498 9t3e27 9505 nn01to3 9616 fztpval 10082 fz0to3un2pr 10122 fz0to4untppr 10123 fzo0to42pr 10219 cu2 10618 i3 10621 binom3 10637 fac3 10711 ege2le3 11678 ef4p 11701 cos1bnd 11766 3prm 12127 oddprmge3 12134 dveflem 14157 sincosq3sgn 14219 sincosq4sgn 14220 tangtx 14229 sincos6thpi 14233 binom4 14367 lgsdir2lem3 14401 |
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