Best Known (18, 18+8, s)-Nets in Base 5
(18, 18+8, 158)-Net over F5 — Constructive and digital
Digital (18, 26, 158)-net over F5, using
- 51 times duplication [i] based on digital (17, 25, 158)-net over F5, using
- net defined by OOA [i] based on linear OOA(525, 158, F5, 8, 8) (dual of [(158, 8), 1239, 9]-NRT-code), using
- OA 4-folding and stacking [i] based on linear OA(525, 632, F5, 8) (dual of [632, 607, 9]-code), using
- construction XX applied to C1 = C([623,5]), C2 = C([0,6]), C3 = C1 + C2 = C([0,5]), and C∩ = C1 ∩ C2 = C([623,6]) [i] based on
- linear OA(521, 624, F5, 7) (dual of [624, 603, 8]-code), using the primitive BCH-code C(I) with length 624 = 54−1, defining interval I = {−1,0,…,5}, and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(521, 624, F5, 7) (dual of [624, 603, 8]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 624 = 54−1, defining interval I = [0,6], and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(525, 624, F5, 8) (dual of [624, 599, 9]-code), using the primitive BCH-code C(I) with length 624 = 54−1, defining interval I = {−1,0,…,6}, and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(517, 624, F5, 6) (dual of [624, 607, 7]-code), using the primitive expurgated narrow-sense BCH-code C(I) with length 624 = 54−1, defining interval I = [0,5], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(50, 4, F5, 0) (dual of [4, 4, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(50, s, F5, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- linear OA(50, 4, F5, 0) (dual of [4, 4, 1]-code) (see above)
- construction XX applied to C1 = C([623,5]), C2 = C([0,6]), C3 = C1 + C2 = C([0,5]), and C∩ = C1 ∩ C2 = C([623,6]) [i] based on
- OA 4-folding and stacking [i] based on linear OA(525, 632, F5, 8) (dual of [632, 607, 9]-code), using
- net defined by OOA [i] based on linear OOA(525, 158, F5, 8, 8) (dual of [(158, 8), 1239, 9]-NRT-code), using
(18, 18+8, 608)-Net over F5 — Digital
Digital (18, 26, 608)-net over F5, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(526, 608, F5, 8) (dual of [608, 582, 9]-code), using
- discarding factors / shortening the dual code based on linear OA(526, 634, F5, 8) (dual of [634, 608, 9]-code), using
- construction X applied to Ce(7) ⊂ Ce(5) [i] based on
- linear OA(525, 625, F5, 8) (dual of [625, 600, 9]-code), using an extension Ce(7) of the primitive narrow-sense BCH-code C(I) with length 624 = 54−1, defining interval I = [1,7], and designed minimum distance d ≥ |I|+1 = 8 [i]
- linear OA(517, 625, F5, 6) (dual of [625, 608, 7]-code), using an extension Ce(5) of the primitive narrow-sense BCH-code C(I) with length 624 = 54−1, defining interval I = [1,5], and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(51, 9, F5, 1) (dual of [9, 8, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(51, s, F5, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(7) ⊂ Ce(5) [i] based on
- discarding factors / shortening the dual code based on linear OA(526, 634, F5, 8) (dual of [634, 608, 9]-code), using
(18, 18+8, 19330)-Net in Base 5 — Upper bound on s
There is no (18, 26, 19331)-net in base 5, because
- the generalized Rao bound for nets shows that 5m ≥ 1 490289 504696 961905 > 526 [i]