Best Known (54−11, 54, s)-Nets in Base 81
(54−11, 54, 1943441)-Net over F81 — Constructive and digital
Digital (43, 54, 1943441)-net over F81, using
- (u, u+v)-construction [i] based on
- digital (8, 13, 265721)-net over F81, using
- net defined by OOA [i] based on linear OOA(8113, 265721, F81, 5, 5) (dual of [(265721, 5), 1328592, 6]-NRT-code), using
- appending kth column [i] based on linear OOA(8113, 265721, F81, 4, 5) (dual of [(265721, 4), 1062871, 6]-NRT-code), using
- OOA 2-folding and stacking with additional row [i] based on linear OA(8113, 531443, F81, 5) (dual of [531443, 531430, 6]-code), using
- discarding factors / shortening the dual code based on linear OA(8113, 531444, F81, 5) (dual of [531444, 531431, 6]-code), using
- construction X applied to Ce(4) ⊂ Ce(3) [i] based on
- linear OA(8113, 531441, F81, 5) (dual of [531441, 531428, 6]-code), using an extension Ce(4) of the primitive narrow-sense BCH-code C(I) with length 531440 = 813−1, defining interval I = [1,4], and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(8110, 531441, F81, 4) (dual of [531441, 531431, 5]-code), using an extension Ce(3) of the primitive narrow-sense BCH-code C(I) with length 531440 = 813−1, defining interval I = [1,3], and designed minimum distance d ≥ |I|+1 = 4 [i]
- linear OA(810, 3, F81, 0) (dual of [3, 3, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(810, s, F81, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(4) ⊂ Ce(3) [i] based on
- discarding factors / shortening the dual code based on linear OA(8113, 531444, F81, 5) (dual of [531444, 531431, 6]-code), using
- OOA 2-folding and stacking with additional row [i] based on linear OA(8113, 531443, F81, 5) (dual of [531443, 531430, 6]-code), using
- appending kth column [i] based on linear OOA(8113, 265721, F81, 4, 5) (dual of [(265721, 4), 1062871, 6]-NRT-code), using
- net defined by OOA [i] based on linear OOA(8113, 265721, F81, 5, 5) (dual of [(265721, 5), 1328592, 6]-NRT-code), using
- digital (30, 41, 1677720)-net over F81, using
- net defined by OOA [i] based on linear OOA(8141, 1677720, F81, 11, 11) (dual of [(1677720, 11), 18454879, 12]-NRT-code), using
- OOA 5-folding and stacking with additional row [i] based on linear OA(8141, 8388601, F81, 11) (dual of [8388601, 8388560, 12]-code), using
- discarding factors / shortening the dual code based on linear OA(8141, large, F81, 11) (dual of [large, large−41, 12]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523361 | 818−1, defining interval I = [0,5], and minimum distance d ≥ |{−5,−4,…,5}|+1 = 12 (BCH-bound) [i]
- discarding factors / shortening the dual code based on linear OA(8141, large, F81, 11) (dual of [large, large−41, 12]-code), using
- OOA 5-folding and stacking with additional row [i] based on linear OA(8141, 8388601, F81, 11) (dual of [8388601, 8388560, 12]-code), using
- net defined by OOA [i] based on linear OOA(8141, 1677720, F81, 11, 11) (dual of [(1677720, 11), 18454879, 12]-NRT-code), using
- digital (8, 13, 265721)-net over F81, using
(54−11, 54, large)-Net over F81 — Digital
Digital (43, 54, large)-net over F81, using
- t-expansion [i] based on digital (42, 54, large)-net over F81, using
- 3 times m-reduction [i] based on digital (42, 57, large)-net over F81, using
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(8157, large, F81, 15) (dual of [large, large−57, 16]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 21523361 | 818−1, defining interval I = [0,7], and minimum distance d ≥ |{−7,−6,…,7}|+1 = 16 (BCH-bound) [i]
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(8157, large, F81, 15) (dual of [large, large−57, 16]-code), using
- 3 times m-reduction [i] based on digital (42, 57, large)-net over F81, using
(54−11, 54, large)-Net in Base 81 — Upper bound on s
There is no (43, 54, large)-net in base 81, because
- 9 times m-reduction [i] would yield (43, 45, large)-net in base 81, but