Best Known (70−13, 70, s)-Nets in Base 81
(70−13, 70, 2796200)-Net over F81 — Constructive and digital
Digital (57, 70, 2796200)-net over F81, using
- net defined by OOA [i] based on linear OOA(8170, 2796200, F81, 14, 13) (dual of [(2796200, 14), 39146730, 14]-NRT-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OOA(8170, 8388601, F81, 2, 13) (dual of [(8388601, 2), 16777132, 14]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(8170, 8388602, F81, 2, 13) (dual of [(8388602, 2), 16777134, 14]-NRT-code), using
- (u, u+v)-construction [i] based on
- linear OOA(8121, 4194301, F81, 2, 6) (dual of [(4194301, 2), 8388581, 7]-NRT-code), using
- OOA 2-folding [i] based on linear OA(8121, 8388602, F81, 6) (dual of [8388602, 8388581, 7]-code), using
- discarding factors / shortening the dual code based on linear OA(8121, large, F81, 6) (dual of [large, large−21, 7]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523360 | 814−1, defining interval I = [0,5], and designed minimum distance d ≥ |I|+1 = 7 [i]
- discarding factors / shortening the dual code based on linear OA(8121, large, F81, 6) (dual of [large, large−21, 7]-code), using
- OOA 2-folding [i] based on linear OA(8121, 8388602, F81, 6) (dual of [8388602, 8388581, 7]-code), using
- linear OOA(8149, 4194301, F81, 2, 13) (dual of [(4194301, 2), 8388553, 14]-NRT-code), using
- OOA 2-folding [i] based on linear OA(8149, 8388602, F81, 13) (dual of [8388602, 8388553, 14]-code), using
- discarding factors / shortening the dual code based on linear OA(8149, large, F81, 13) (dual of [large, large−49, 14]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523361 | 818−1, defining interval I = [0,6], and minimum distance d ≥ |{−6,−5,…,6}|+1 = 14 (BCH-bound) [i]
- discarding factors / shortening the dual code based on linear OA(8149, large, F81, 13) (dual of [large, large−49, 14]-code), using
- OOA 2-folding [i] based on linear OA(8149, 8388602, F81, 13) (dual of [8388602, 8388553, 14]-code), using
- linear OOA(8121, 4194301, F81, 2, 6) (dual of [(4194301, 2), 8388581, 7]-NRT-code), using
- (u, u+v)-construction [i] based on
- discarding factors / shortening the dual code based on linear OOA(8170, 8388602, F81, 2, 13) (dual of [(8388602, 2), 16777134, 14]-NRT-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OOA(8170, 8388601, F81, 2, 13) (dual of [(8388601, 2), 16777132, 14]-NRT-code), using
(70−13, 70, large)-Net over F81 — Digital
Digital (57, 70, large)-net over F81, using
- 7 times m-reduction [i] based on digital (57, 77, large)-net over F81, using
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(8177, large, F81, 20) (dual of [large, large−77, 21]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523360 | 814−1, defining interval I = [0,19], and designed minimum distance d ≥ |I|+1 = 21 [i]
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(8177, large, F81, 20) (dual of [large, large−77, 21]-code), using
(70−13, 70, large)-Net in Base 81 — Upper bound on s
There is no (57, 70, large)-net in base 81, because
- 11 times m-reduction [i] would yield (57, 59, large)-net in base 81, but