Best Known (42, 42+7, s)-Nets in Base 4
(42, 42+7, 87389)-Net over F4 — Constructive and digital
Digital (42, 49, 87389)-net over F4, using
- (u, u+v)-construction [i] based on
- digital (0, 3, 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 (39, 46, 87384)-net over F4, using
- net defined by OOA [i] based on linear OOA(446, 87384, F4, 7, 7) (dual of [(87384, 7), 611642, 8]-NRT-code), using
- OOA 3-folding and stacking with additional row [i] based on linear OA(446, 262153, F4, 7) (dual of [262153, 262107, 8]-code), using
- construction X applied to Ce(6) ⊂ Ce(5) [i] based on
- linear OA(446, 262144, F4, 7) (dual of [262144, 262098, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 262143 = 49−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(437, 262144, F4, 6) (dual of [262144, 262107, 7]-code), using an extension Ce(5) of the primitive narrow-sense BCH-code C(I) with length 262143 = 49−1, defining interval I = [1,5], and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(40, 9, F4, 0) (dual of [9, 9, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(40, s, F4, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(6) ⊂ Ce(5) [i] based on
- OOA 3-folding and stacking with additional row [i] based on linear OA(446, 262153, F4, 7) (dual of [262153, 262107, 8]-code), using
- net defined by OOA [i] based on linear OOA(446, 87384, F4, 7, 7) (dual of [(87384, 7), 611642, 8]-NRT-code), using
- digital (0, 3, 5)-net over F4, using
(42, 42+7, 262168)-Net over F4 — Digital
Digital (42, 49, 262168)-net over F4, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(449, 262168, F4, 7) (dual of [262168, 262119, 8]-code), using
- construction X with Varšamov bound [i] based on
- linear OA(447, 262164, F4, 7) (dual of [262164, 262117, 8]-code), using
- construction X4 applied to Ce(6) ⊂ Ce(4) [i] based on
- linear OA(446, 262144, F4, 7) (dual of [262144, 262098, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 262143 = 49−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(428, 262144, F4, 5) (dual of [262144, 262116, 6]-code), using an extension Ce(4) of the primitive narrow-sense BCH-code C(I) with length 262143 = 49−1, defining interval I = [1,4], and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(419, 20, F4, 19) (dual of [20, 1, 20]-code or 20-arc in PG(18,4)), using
- dual of repetition code with length 20 [i]
- linear OA(41, 20, F4, 1) (dual of [20, 19, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(41, s, F4, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X4 applied to Ce(6) ⊂ Ce(4) [i] based on
- linear OA(447, 262166, F4, 6) (dual of [262166, 262119, 7]-code), using Gilbert–Varšamov bound and bm = 447 > Vbs−1(k−1) = 2507 753119 132685 823072 496960 [i]
- linear OA(40, 2, F4, 0) (dual of [2, 2, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(40, s, F4, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- linear OA(447, 262164, F4, 7) (dual of [262164, 262117, 8]-code), using
- construction X with Varšamov bound [i] based on
(42, 42+7, large)-Net in Base 4 — Upper bound on s
There is no (42, 49, large)-net in base 4, because
- 5 times m-reduction [i] would yield (42, 44, large)-net in base 4, but