Best Known (18, 18+20, s)-Nets in Base 64
(18, 18+20, 257)-Net over F64 — Constructive and digital
Digital (18, 38, 257)-net over F64, using
- (u, u+v)-construction [i] based on
- digital (1, 11, 80)-net over F64, using
- net from sequence [i] based on digital (1, 79)-sequence over F64, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F64 with g(F) = 1 and N(F) ≥ 80, using
- net from sequence [i] based on digital (1, 79)-sequence over F64, using
- digital (7, 27, 177)-net over F64, using
- net from sequence [i] based on digital (7, 176)-sequence over F64, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F64 with g(F) = 7 and N(F) ≥ 177, using
- net from sequence [i] based on digital (7, 176)-sequence over F64, using
- digital (1, 11, 80)-net over F64, using
(18, 18+20, 337)-Net in Base 64 — Constructive
(18, 38, 337)-net in base 64, using
- (u, u+v)-construction [i] based on
- digital (1, 11, 80)-net over F64, using
- net from sequence [i] based on digital (1, 79)-sequence over F64, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F64 with g(F) = 1 and N(F) ≥ 80, using
- net from sequence [i] based on digital (1, 79)-sequence over F64, using
- (7, 27, 257)-net in base 64, using
- 1 times m-reduction [i] based on (7, 28, 257)-net in base 64, using
- base change [i] based on digital (0, 21, 257)-net over F256, using
- net from sequence [i] based on digital (0, 256)-sequence over F256, using
- generalized Faure sequence [i]
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F256 with g(F) = 0 and N(F) ≥ 257, using
- the rational function field F256(x) [i]
- Niederreiter sequence [i]
- net from sequence [i] based on digital (0, 256)-sequence over F256, using
- base change [i] based on digital (0, 21, 257)-net over F256, using
- 1 times m-reduction [i] based on (7, 28, 257)-net in base 64, using
- digital (1, 11, 80)-net over F64, using
(18, 18+20, 611)-Net over F64 — Digital
Digital (18, 38, 611)-net over F64, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(6438, 611, F64, 20) (dual of [611, 573, 21]-code), using
- discarding factors / shortening the dual code based on linear OA(6438, 819, F64, 20) (dual of [819, 781, 21]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 819 | 642−1, defining interval I = [0,19], and designed minimum distance d ≥ |I|+1 = 21 [i]
- discarding factors / shortening the dual code based on linear OA(6438, 819, F64, 20) (dual of [819, 781, 21]-code), using
(18, 18+20, 524947)-Net in Base 64 — Upper bound on s
There is no (18, 38, 524948)-net in base 64, because
- the generalized Rao bound for nets shows that 64m ≥ 431 363960 497513 626377 714493 383984 663975 314468 200011 275427 577366 087466 > 6438 [i]