Best Known (13−7, 13, s)-Nets in Base 27
(13−7, 13, 243)-Net over F27 — Constructive and digital
Digital (6, 13, 243)-net over F27, using
- net defined by OOA [i] based on linear OOA(2713, 243, F27, 7, 7) (dual of [(243, 7), 1688, 8]-NRT-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OA(2713, 730, F27, 7) (dual of [730, 717, 8]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 730 | 274−1, defining interval I = [0,3], and minimum distance d ≥ |{−3,−2,…,3}|+1 = 8 (BCH-bound) [i]
- OOA 3-folding and stacking with additional row [i] based on linear OA(2713, 730, F27, 7) (dual of [730, 717, 8]-code), using
(13−7, 13, 366)-Net over F27 — Digital
Digital (6, 13, 366)-net over F27, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2713, 366, F27, 2, 7) (dual of [(366, 2), 719, 8]-NRT-code), using
- OOA 2-folding [i] based on linear OA(2713, 732, F27, 7) (dual of [732, 719, 8]-code), using
- construction XX applied to C1 = C([727,4]), C2 = C([0,5]), C3 = C1 + C2 = C([0,4]), and C∩ = C1 ∩ C2 = C([727,5]) [i] based on
- linear OA(2711, 728, F27, 6) (dual of [728, 717, 7]-code), using the primitive BCH-code C(I) with length 728 = 272−1, defining interval I = {−1,0,…,4}, and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(2711, 728, F27, 6) (dual of [728, 717, 7]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 728 = 272−1, defining interval I = [0,5], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(2713, 728, F27, 7) (dual of [728, 715, 8]-code), using the primitive BCH-code C(I) with length 728 = 272−1, defining interval I = {−1,0,…,5}, and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(279, 728, F27, 5) (dual of [728, 719, 6]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 728 = 272−1, defining interval I = [0,4], and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(270, 2, F27, 0) (dual of [2, 2, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(270, s, F27, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- linear OA(270, 2, F27, 0) (dual of [2, 2, 1]-code) (see above)
- construction XX applied to C1 = C([727,4]), C2 = C([0,5]), C3 = C1 + C2 = C([0,4]), and C∩ = C1 ∩ C2 = C([727,5]) [i] based on
- OOA 2-folding [i] based on linear OA(2713, 732, F27, 7) (dual of [732, 719, 8]-code), using
(13−7, 13, 37140)-Net in Base 27 — Upper bound on s
There is no (6, 13, 37141)-net in base 27, because
- 1 times m-reduction [i] would yield (6, 12, 37141)-net in base 27, but
- the generalized Rao bound for nets shows that 27m ≥ 150095 854488 434323 > 2712 [i]