Best Known (231, 231+22, s)-Nets in Base 4
(231, 231+22, 1525205)-Net over F4 — Constructive and digital
Digital (231, 253, 1525205)-net over F4, using
- (u, u+v)-construction [i] based on
- digital (0, 11, 5)-net over F4, using
- net from sequence [i] based on digital (0, 4)-sequence over F4, using
- generalized Faure sequence [i]
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F4 with g(F) = 0 and N(F) ≥ 5, using
- the rational function field F4(x) [i]
- Niederreiter sequence [i]
- net from sequence [i] based on digital (0, 4)-sequence over F4, using
- digital (220, 242, 1525200)-net over F4, using
- trace code for nets [i] based on digital (99, 121, 762600)-net over F16, using
- net defined by OOA [i] based on linear OOA(16121, 762600, F16, 22, 22) (dual of [(762600, 22), 16777079, 23]-NRT-code), using
- OA 11-folding and stacking [i] based on linear OA(16121, 8388600, F16, 22) (dual of [8388600, 8388479, 23]-code), using
- discarding factors / shortening the dual code based on linear OA(16121, large, F16, 22) (dual of [large, large−121, 23]-code), using
- the primitive expurgated narrow-sense BCH-code C(I) with length 16777215 = 166−1, defining interval I = [0,21], and designed minimum distance d ≥ |I|+1 = 23 [i]
- discarding factors / shortening the dual code based on linear OA(16121, large, F16, 22) (dual of [large, large−121, 23]-code), using
- OA 11-folding and stacking [i] based on linear OA(16121, 8388600, F16, 22) (dual of [8388600, 8388479, 23]-code), using
- net defined by OOA [i] based on linear OOA(16121, 762600, F16, 22, 22) (dual of [(762600, 22), 16777079, 23]-NRT-code), using
- trace code for nets [i] based on digital (99, 121, 762600)-net over F16, using
- digital (0, 11, 5)-net over F4, using
(231, 231+22, large)-Net over F4 — Digital
Digital (231, 253, large)-net over F4, using
- 4 times m-reduction [i] based on digital (231, 257, large)-net over F4, using
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(4257, large, F4, 26) (dual of [large, large−257, 27]-code), using
- 28 times code embedding in larger space [i] based on linear OA(4229, large, F4, 26) (dual of [large, large−229, 27]-code), using
- the primitive expurgated narrow-sense BCH-code C(I) with length 16777215 = 412−1, defining interval I = [0,25], and designed minimum distance d ≥ |I|+1 = 27 [i]
- 28 times code embedding in larger space [i] based on linear OA(4229, large, F4, 26) (dual of [large, large−229, 27]-code), using
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(4257, large, F4, 26) (dual of [large, large−257, 27]-code), using
(231, 231+22, large)-Net in Base 4 — Upper bound on s
There is no (231, 253, large)-net in base 4, because
- 20 times m-reduction [i] would yield (231, 233, large)-net in base 4, but