Best Known (20, 20+4, s)-Nets in Base 5
(20, 20+4, 39072)-Net over F5 — Constructive and digital
Digital (20, 24, 39072)-net over F5, using
- net defined by OOA [i] based on linear OOA(524, 39072, F5, 4, 4) (dual of [(39072, 4), 156264, 5]-NRT-code), using
- appending kth column [i] based on linear OOA(524, 39072, F5, 3, 4) (dual of [(39072, 3), 117192, 5]-NRT-code), using
- (u, u+v)-construction [i] based on
- linear OOA(52, 6, F5, 3, 2) (dual of [(6, 3), 16, 3]-NRT-code), using
- extended Reed–Solomon NRT-code RSe(3;16,5) [i]
- linear OOA(522, 39066, F5, 3, 4) (dual of [(39066, 3), 117176, 5]-NRT-code), using
- OA 2-folding and stacking [i] based on linear OA(522, 78132, F5, 4) (dual of [78132, 78110, 5]-code), using
- construction X applied to Ce(3) ⊂ Ce(2) [i] based on
- linear OA(522, 78125, F5, 4) (dual of [78125, 78103, 5]-code), using an extension Ce(3) of the primitive narrow-sense BCH-code C(I) with length 78124 = 57−1, defining interval I = [1,3], and designed minimum distance d ≥ |I|+1 = 4 [i]
- linear OA(515, 78125, F5, 3) (dual of [78125, 78110, 4]-code or 78125-cap in PG(14,5)), using an extension Ce(2) of the primitive narrow-sense BCH-code C(I) with length 78124 = 57−1, defining interval I = [1,2], and designed minimum distance d ≥ |I|+1 = 3 [i]
- linear OA(50, 7, F5, 0) (dual of [7, 7, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(50, s, F5, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(3) ⊂ Ce(2) [i] based on
- OA 2-folding and stacking [i] based on linear OA(522, 78132, F5, 4) (dual of [78132, 78110, 5]-code), using
- linear OOA(52, 6, F5, 3, 2) (dual of [(6, 3), 16, 3]-NRT-code), using
- (u, u+v)-construction [i] based on
- appending kth column [i] based on linear OOA(524, 39072, F5, 3, 4) (dual of [(39072, 3), 117192, 5]-NRT-code), using
(20, 20+4, 177454)-Net over F5 — Digital
Digital (20, 24, 177454)-net over F5, using
- net defined by OOA [i] based on linear OOA(524, 177454, F5, 4, 4) (dual of [(177454, 4), 709792, 5]-NRT-code), using
- appending kth column [i] based on linear OOA(524, 177454, F5, 3, 4) (dual of [(177454, 3), 532338, 5]-NRT-code), using
(20, 20+4, large)-Net in Base 5 — Upper bound on s
There is no (20, 24, large)-net in base 5, because
- 2 times m-reduction [i] would yield (20, 22, large)-net in base 5, but