Best Known (73−14, 73, s)-Nets in Base 81
(73−14, 73, 1375520)-Net over F81 — Constructive and digital
Digital (59, 73, 1375520)-net over F81, using
- (u, u+v)-construction [i] based on
- digital (13, 20, 177149)-net over F81, using
- net defined by OOA [i] based on linear OOA(8120, 177149, F81, 7, 7) (dual of [(177149, 7), 1240023, 8]-NRT-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OA(8120, 531448, F81, 7) (dual of [531448, 531428, 8]-code), using
- discarding factors / shortening the dual code based on linear OA(8120, 531449, F81, 7) (dual of [531449, 531429, 8]-code), using
- construction X applied to C([0,3]) ⊂ C([0,2]) [i] based on
- linear OA(8119, 531442, F81, 7) (dual of [531442, 531423, 8]-code), using the expurgated narrow-sense BCH-code C(I) with length 531442 | 816−1, defining interval I = [0,3], and minimum distance d ≥ |{−3,−2,…,3}|+1 = 8 (BCH-bound) [i]
- linear OA(8113, 531442, F81, 5) (dual of [531442, 531429, 6]-code), using the expurgated narrow-sense BCH-code C(I) with length 531442 | 816−1, defining interval I = [0,2], and minimum distance d ≥ |{−2,−1,0,1,2}|+1 = 6 (BCH-bound) [i]
- linear OA(811, 7, F81, 1) (dual of [7, 6, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(811, s, F81, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to C([0,3]) ⊂ C([0,2]) [i] based on
- discarding factors / shortening the dual code based on linear OA(8120, 531449, F81, 7) (dual of [531449, 531429, 8]-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OA(8120, 531448, F81, 7) (dual of [531448, 531428, 8]-code), using
- net defined by OOA [i] based on linear OOA(8120, 177149, F81, 7, 7) (dual of [(177149, 7), 1240023, 8]-NRT-code), using
- digital (39, 53, 1198371)-net over F81, using
- net defined by OOA [i] based on linear OOA(8153, 1198371, F81, 14, 14) (dual of [(1198371, 14), 16777141, 15]-NRT-code), using
- OA 7-folding and stacking [i] based on linear OA(8153, 8388597, F81, 14) (dual of [8388597, 8388544, 15]-code), using
- discarding factors / shortening the dual code based on linear OA(8153, large, F81, 14) (dual of [large, large−53, 15]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523360 | 814−1, defining interval I = [0,13], and designed minimum distance d ≥ |I|+1 = 15 [i]
- discarding factors / shortening the dual code based on linear OA(8153, large, F81, 14) (dual of [large, large−53, 15]-code), using
- OA 7-folding and stacking [i] based on linear OA(8153, 8388597, F81, 14) (dual of [8388597, 8388544, 15]-code), using
- net defined by OOA [i] based on linear OOA(8153, 1198371, F81, 14, 14) (dual of [(1198371, 14), 16777141, 15]-NRT-code), using
- digital (13, 20, 177149)-net over F81, using
(73−14, 73, large)-Net over F81 — Digital
Digital (59, 73, large)-net over F81, using
- t-expansion [i] based on digital (57, 73, large)-net over F81, using
- 4 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
- 4 times m-reduction [i] based on digital (57, 77, large)-net over F81, using
(73−14, 73, large)-Net in Base 81 — Upper bound on s
There is no (59, 73, large)-net in base 81, because
- 12 times m-reduction [i] would yield (59, 61, large)-net in base 81, but