Best Known (81, 81+28, s)-Nets in Base 25
(81, 81+28, 27903)-Net over F25 — Constructive and digital
Digital (81, 109, 27903)-net over F25, using
- net defined by OOA [i] based on linear OOA(25109, 27903, F25, 28, 28) (dual of [(27903, 28), 781175, 29]-NRT-code), using
- OA 14-folding and stacking [i] based on linear OA(25109, 390642, F25, 28) (dual of [390642, 390533, 29]-code), using
- discarding factors / shortening the dual code based on linear OA(25109, 390645, F25, 28) (dual of [390645, 390536, 29]-code), using
- construction X applied to Ce(27) ⊂ Ce(22) [i] based on
- linear OA(25105, 390625, F25, 28) (dual of [390625, 390520, 29]-code), using an extension Ce(27) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,27], and designed minimum distance d ≥ |I|+1 = 28 [i]
- linear OA(2589, 390625, F25, 23) (dual of [390625, 390536, 24]-code), using an extension Ce(22) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,22], and designed minimum distance d ≥ |I|+1 = 23 [i]
- linear OA(254, 20, F25, 4) (dual of [20, 16, 5]-code or 20-arc in PG(3,25)), using
- discarding factors / shortening the dual code based on linear OA(254, 25, F25, 4) (dual of [25, 21, 5]-code or 25-arc in PG(3,25)), using
- Reed–Solomon code RS(21,25) [i]
- discarding factors / shortening the dual code based on linear OA(254, 25, F25, 4) (dual of [25, 21, 5]-code or 25-arc in PG(3,25)), using
- construction X applied to Ce(27) ⊂ Ce(22) [i] based on
- discarding factors / shortening the dual code based on linear OA(25109, 390645, F25, 28) (dual of [390645, 390536, 29]-code), using
- OA 14-folding and stacking [i] based on linear OA(25109, 390642, F25, 28) (dual of [390642, 390533, 29]-code), using
(81, 81+28, 281767)-Net over F25 — Digital
Digital (81, 109, 281767)-net over F25, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(25109, 281767, F25, 28) (dual of [281767, 281658, 29]-code), using
- discarding factors / shortening the dual code based on linear OA(25109, 390645, F25, 28) (dual of [390645, 390536, 29]-code), using
- construction X applied to Ce(27) ⊂ Ce(22) [i] based on
- linear OA(25105, 390625, F25, 28) (dual of [390625, 390520, 29]-code), using an extension Ce(27) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,27], and designed minimum distance d ≥ |I|+1 = 28 [i]
- linear OA(2589, 390625, F25, 23) (dual of [390625, 390536, 24]-code), using an extension Ce(22) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,22], and designed minimum distance d ≥ |I|+1 = 23 [i]
- linear OA(254, 20, F25, 4) (dual of [20, 16, 5]-code or 20-arc in PG(3,25)), using
- discarding factors / shortening the dual code based on linear OA(254, 25, F25, 4) (dual of [25, 21, 5]-code or 25-arc in PG(3,25)), using
- Reed–Solomon code RS(21,25) [i]
- discarding factors / shortening the dual code based on linear OA(254, 25, F25, 4) (dual of [25, 21, 5]-code or 25-arc in PG(3,25)), using
- construction X applied to Ce(27) ⊂ Ce(22) [i] based on
- discarding factors / shortening the dual code based on linear OA(25109, 390645, F25, 28) (dual of [390645, 390536, 29]-code), using
(81, 81+28, large)-Net in Base 25 — Upper bound on s
There is no (81, 109, large)-net in base 25, because
- 26 times m-reduction [i] would yield (81, 83, large)-net in base 25, but