Best Known (37, 56, s)-Nets in Base 64
(37, 56, 29127)-Net over F64 — Constructive and digital
Digital (37, 56, 29127)-net over F64, using
- 641 times duplication [i] based on digital (36, 55, 29127)-net over F64, using
- net defined by OOA [i] based on linear OOA(6455, 29127, F64, 19, 19) (dual of [(29127, 19), 553358, 20]-NRT-code), using
- OOA 9-folding and stacking with additional row [i] based on linear OA(6455, 262144, F64, 19) (dual of [262144, 262089, 20]-code), using
- an extension Ce(18) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,18], and designed minimum distance d ≥ |I|+1 = 19 [i]
- OOA 9-folding and stacking with additional row [i] based on linear OA(6455, 262144, F64, 19) (dual of [262144, 262089, 20]-code), using
- net defined by OOA [i] based on linear OOA(6455, 29127, F64, 19, 19) (dual of [(29127, 19), 553358, 20]-NRT-code), using
(37, 56, 131076)-Net over F64 — Digital
Digital (37, 56, 131076)-net over F64, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(6456, 131076, F64, 2, 19) (dual of [(131076, 2), 262096, 20]-NRT-code), using
- OOA 2-folding [i] based on linear OA(6456, 262152, F64, 19) (dual of [262152, 262096, 20]-code), using
- construction X applied to C([0,9]) ⊂ C([0,8]) [i] based on
- linear OA(6455, 262145, F64, 19) (dual of [262145, 262090, 20]-code), using the expurgated narrow-sense BCH-code C(I) with length 262145 | 646−1, defining interval I = [0,9], and minimum distance d ≥ |{−9,−8,…,9}|+1 = 20 (BCH-bound) [i]
- linear OA(6449, 262145, F64, 17) (dual of [262145, 262096, 18]-code), using the expurgated narrow-sense BCH-code C(I) with length 262145 | 646−1, defining interval I = [0,8], and minimum distance d ≥ |{−8,−7,…,8}|+1 = 18 (BCH-bound) [i]
- linear OA(641, 7, F64, 1) (dual of [7, 6, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(641, s, F64, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to C([0,9]) ⊂ C([0,8]) [i] based on
- OOA 2-folding [i] based on linear OA(6456, 262152, F64, 19) (dual of [262152, 262096, 20]-code), using
(37, 56, large)-Net in Base 64 — Upper bound on s
There is no (37, 56, large)-net in base 64, because
- 17 times m-reduction [i] would yield (37, 39, large)-net in base 64, but