Best Known (20−5, 20, s)-Nets in Base 3
(20−5, 20, 370)-Net over F3 — Constructive and digital
Digital (15, 20, 370)-net over F3, using
- net defined by OOA [i] based on linear OOA(320, 370, F3, 5, 5) (dual of [(370, 5), 1830, 6]-NRT-code), using
- OOA 2-folding and stacking with additional row [i] based on linear OA(320, 741, F3, 5) (dual of [741, 721, 6]-code), using
- construction XX applied to C1 = C([361,364]), C2 = C([363,365]), C3 = C1 + C2 = C([363,364]), and C∩ = C1 ∩ C2 = C([361,365]) [i] based on
- linear OA(313, 728, F3, 4) (dual of [728, 715, 5]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {361,362,363,364}, and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(313, 728, F3, 3) (dual of [728, 715, 4]-code or 728-cap in PG(12,3)), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {363,364,365}, and designed minimum distance d ≥ |I|+1 = 4 [i]
- linear OA(319, 728, F3, 5) (dual of [728, 709, 6]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {361,362,363,364,365}, and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(37, 728, F3, 2) (dual of [728, 721, 3]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {363,364}, and designed minimum distance d ≥ |I|+1 = 3 [i]
- linear OA(31, 7, F3, 1) (dual of [7, 6, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(31, s, F3, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- linear OA(30, 6, F3, 0) (dual of [6, 6, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(30, s, F3, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction XX applied to C1 = C([361,364]), C2 = C([363,365]), C3 = C1 + C2 = C([363,364]), and C∩ = C1 ∩ C2 = C([361,365]) [i] based on
- OOA 2-folding and stacking with additional row [i] based on linear OA(320, 741, F3, 5) (dual of [741, 721, 6]-code), using
(20−5, 20, 741)-Net over F3 — Digital
Digital (15, 20, 741)-net over F3, using
- net defined by OOA [i] based on linear OOA(320, 741, F3, 5, 5) (dual of [(741, 5), 3685, 6]-NRT-code), using
- appending kth column [i] based on linear OOA(320, 741, F3, 4, 5) (dual of [(741, 4), 2944, 6]-NRT-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(320, 741, F3, 5) (dual of [741, 721, 6]-code), using
- construction XX applied to C1 = C([361,364]), C2 = C([363,365]), C3 = C1 + C2 = C([363,364]), and C∩ = C1 ∩ C2 = C([361,365]) [i] based on
- linear OA(313, 728, F3, 4) (dual of [728, 715, 5]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {361,362,363,364}, and designed minimum distance d ≥ |I|+1 = 5 [i]
- linear OA(313, 728, F3, 3) (dual of [728, 715, 4]-code or 728-cap in PG(12,3)), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {363,364,365}, and designed minimum distance d ≥ |I|+1 = 4 [i]
- linear OA(319, 728, F3, 5) (dual of [728, 709, 6]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {361,362,363,364,365}, and designed minimum distance d ≥ |I|+1 = 6 [i]
- linear OA(37, 728, F3, 2) (dual of [728, 721, 3]-code), using the primitive BCH-code C(I) with length 728 = 36−1, defining interval I = {363,364}, and designed minimum distance d ≥ |I|+1 = 3 [i]
- linear OA(31, 7, F3, 1) (dual of [7, 6, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(31, s, F3, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- linear OA(30, 6, F3, 0) (dual of [6, 6, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(30, s, F3, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction XX applied to C1 = C([361,364]), C2 = C([363,365]), C3 = C1 + C2 = C([363,364]), and C∩ = C1 ∩ C2 = C([361,365]) [i] based on
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(320, 741, F3, 5) (dual of [741, 721, 6]-code), using
- appending kth column [i] based on linear OOA(320, 741, F3, 4, 5) (dual of [(741, 4), 2944, 6]-NRT-code), using
(20−5, 20, 24105)-Net in Base 3 — Upper bound on s
There is no (15, 20, 24106)-net in base 3, because
- 1 times m-reduction [i] would yield (15, 19, 24106)-net in base 3, but
- the generalized Rao bound for nets shows that 3m ≥ 1162 343109 > 319 [i]