Best Known (12, 21, s)-Nets in Base 64
(12, 21, 1089)-Net over F64 — Constructive and digital
Digital (12, 21, 1089)-net over F64, using
- (u, u+v)-construction [i] based on
- digital (0, 4, 65)-net over F64, using
- net from sequence [i] based on digital (0, 64)-sequence over F64, using
- generalized Faure sequence [i]
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F64 with g(F) = 0 and N(F) ≥ 65, using
- the rational function field F64(x) [i]
- Niederreiter sequence [i]
- net from sequence [i] based on digital (0, 64)-sequence over F64, using
- digital (8, 17, 1024)-net over F64, using
- net defined by OOA [i] based on linear OOA(6417, 1024, F64, 9, 9) (dual of [(1024, 9), 9199, 10]-NRT-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(6417, 4097, F64, 9) (dual of [4097, 4080, 10]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 4097 | 644−1, defining interval I = [0,4], and minimum distance d ≥ |{−4,−3,…,4}|+1 = 10 (BCH-bound) [i]
- OOA 4-folding and stacking with additional row [i] based on linear OA(6417, 4097, F64, 9) (dual of [4097, 4080, 10]-code), using
- net defined by OOA [i] based on linear OOA(6417, 1024, F64, 9, 9) (dual of [(1024, 9), 9199, 10]-NRT-code), using
- digital (0, 4, 65)-net over F64, using
(12, 21, 4097)-Net in Base 64 — Constructive
(12, 21, 4097)-net in base 64, using
- base change [i] based on digital (9, 18, 4097)-net over F128, using
- net defined by OOA [i] based on linear OOA(12818, 4097, F128, 9, 9) (dual of [(4097, 9), 36855, 10]-NRT-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(12818, 16389, F128, 9) (dual of [16389, 16371, 10]-code), using
- discarding factors / shortening the dual code based on linear OA(12818, 16390, F128, 9) (dual of [16390, 16372, 10]-code), using
- construction X applied to C([0,4]) ⊂ C([0,3]) [i] based on
- linear OA(12817, 16385, F128, 9) (dual of [16385, 16368, 10]-code), using the expurgated narrow-sense BCH-code C(I) with length 16385 | 1284−1, defining interval I = [0,4], and minimum distance d ≥ |{−4,−3,…,4}|+1 = 10 (BCH-bound) [i]
- linear OA(12813, 16385, F128, 7) (dual of [16385, 16372, 8]-code), using the expurgated narrow-sense BCH-code C(I) with length 16385 | 1284−1, defining interval I = [0,3], and minimum distance d ≥ |{−3,−2,…,3}|+1 = 8 (BCH-bound) [i]
- linear OA(1281, 5, F128, 1) (dual of [5, 4, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(1281, s, F128, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to C([0,4]) ⊂ C([0,3]) [i] based on
- discarding factors / shortening the dual code based on linear OA(12818, 16390, F128, 9) (dual of [16390, 16372, 10]-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(12818, 16389, F128, 9) (dual of [16389, 16371, 10]-code), using
- net defined by OOA [i] based on linear OOA(12818, 4097, F128, 9, 9) (dual of [(4097, 9), 36855, 10]-NRT-code), using
(12, 21, 4399)-Net over F64 — Digital
Digital (12, 21, 4399)-net over F64, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(6421, 4399, F64, 9) (dual of [4399, 4378, 10]-code), using
- 297 step Varšamov–Edel lengthening with (ri) = (2, 0, 0, 0, 1, 33 times 0, 1, 258 times 0) [i] based on linear OA(6417, 4098, F64, 9) (dual of [4098, 4081, 10]-code), using
- construction X applied to Ce(8) ⊂ Ce(7) [i] based on
- linear OA(6417, 4096, F64, 9) (dual of [4096, 4079, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 4095 = 642−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(6415, 4096, F64, 8) (dual of [4096, 4081, 9]-code), using an extension Ce(7) of the primitive narrow-sense BCH-code C(I) with length 4095 = 642−1, defining interval I = [1,7], and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(640, 2, F64, 0) (dual of [2, 2, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(640, s, F64, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(8) ⊂ Ce(7) [i] based on
- 297 step Varšamov–Edel lengthening with (ri) = (2, 0, 0, 0, 1, 33 times 0, 1, 258 times 0) [i] based on linear OA(6417, 4098, F64, 9) (dual of [4098, 4081, 10]-code), using
(12, 21, 8195)-Net in Base 64
(12, 21, 8195)-net in base 64, using
- base change [i] based on digital (9, 18, 8195)-net over F128, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(12818, 8195, F128, 2, 9) (dual of [(8195, 2), 16372, 10]-NRT-code), using
- OOA 2-folding [i] based on linear OA(12818, 16390, F128, 9) (dual of [16390, 16372, 10]-code), using
- construction X applied to C([0,4]) ⊂ C([0,3]) [i] based on
- linear OA(12817, 16385, F128, 9) (dual of [16385, 16368, 10]-code), using the expurgated narrow-sense BCH-code C(I) with length 16385 | 1284−1, defining interval I = [0,4], and minimum distance d ≥ |{−4,−3,…,4}|+1 = 10 (BCH-bound) [i]
- linear OA(12813, 16385, F128, 7) (dual of [16385, 16372, 8]-code), using the expurgated narrow-sense BCH-code C(I) with length 16385 | 1284−1, defining interval I = [0,3], and minimum distance d ≥ |{−3,−2,…,3}|+1 = 8 (BCH-bound) [i]
- linear OA(1281, 5, F128, 1) (dual of [5, 4, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(1281, s, F128, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to C([0,4]) ⊂ C([0,3]) [i] based on
- OOA 2-folding [i] based on linear OA(12818, 16390, F128, 9) (dual of [16390, 16372, 10]-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(12818, 8195, F128, 2, 9) (dual of [(8195, 2), 16372, 10]-NRT-code), using
(12, 21, large)-Net in Base 64 — Upper bound on s
There is no (12, 21, large)-net in base 64, because
- 7 times m-reduction [i] would yield (12, 14, large)-net in base 64, but