Best Known (57, 57+12, s)-Nets in Base 81
(57, 57+12, 2796201)-Net over F81 — Constructive and digital
Digital (57, 69, 2796201)-net over F81, using
- net defined by OOA [i] based on linear OOA(8169, 2796201, F81, 15, 12) (dual of [(2796201, 15), 41942946, 13]-NRT-code), using
- OOA 2-folding and stacking with additional row [i] based on linear OOA(8169, 5592403, F81, 3, 12) (dual of [(5592403, 3), 16777140, 13]-NRT-code), using
- 1 times NRT-code embedding in larger space [i] based on linear OOA(8166, 5592402, F81, 3, 12) (dual of [(5592402, 3), 16777140, 13]-NRT-code), using
- (u, u+v)-construction [i] based on
- linear OOA(8121, 2796201, F81, 3, 6) (dual of [(2796201, 3), 8388582, 7]-NRT-code), using
- OOA 3-folding [i] 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]
- OOA 3-folding [i] based on linear OA(8121, large, F81, 6) (dual of [large, large−21, 7]-code), using
- linear OOA(8145, 2796201, F81, 3, 12) (dual of [(2796201, 3), 8388558, 13]-NRT-code), using
- OOA 3-folding [i] based on linear OA(8145, large, F81, 12) (dual of [large, large−45, 13]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523360 | 814−1, defining interval I = [0,11], and designed minimum distance d ≥ |I|+1 = 13 [i]
- OOA 3-folding [i] based on linear OA(8145, large, F81, 12) (dual of [large, large−45, 13]-code), using
- linear OOA(8121, 2796201, F81, 3, 6) (dual of [(2796201, 3), 8388582, 7]-NRT-code), using
- (u, u+v)-construction [i] based on
- 1 times NRT-code embedding in larger space [i] based on linear OOA(8166, 5592402, F81, 3, 12) (dual of [(5592402, 3), 16777140, 13]-NRT-code), using
- OOA 2-folding and stacking with additional row [i] based on linear OOA(8169, 5592403, F81, 3, 12) (dual of [(5592403, 3), 16777140, 13]-NRT-code), using
(57, 57+12, large)-Net over F81 — Digital
Digital (57, 69, large)-net over F81, using
- 8 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
(57, 57+12, large)-Net in Base 81 — Upper bound on s
There is no (57, 69, large)-net in base 81, because
- 10 times m-reduction [i] would yield (57, 59, large)-net in base 81, but