Best Known (21−4, 21, s)-Nets in Base 25
(21−4, 21, 4882925)-Net over F25 — Constructive and digital
Digital (17, 21, 4882925)-net over F25, using
- generalized (u, u+v)-construction [i] based on
- digital (0, 0, 195317)-net over F25, using
- s-reduction based on digital (0, 0, s)-net over F25 with arbitrarily large s, using
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 0, 195317)-net over F25 (see above)
- digital (0, 1, 195317)-net over F25, using
- s-reduction based on digital (0, 1, s)-net over F25 with arbitrarily large s, using
- digital (0, 1, 195317)-net over F25 (see above)
- digital (3, 5, 195317)-net over F25, using
- s-reduction based on digital (3, 5, 406901)-net over F25, using
- digital (10, 14, 195317)-net over F25, using
- net defined by OOA [i] based on linear OOA(2514, 195317, F25, 4, 4) (dual of [(195317, 4), 781254, 5]-NRT-code), using
- OA 2-folding and stacking [i] based on linear OA(2514, 390634, F25, 4) (dual of [390634, 390620, 5]-code), using
- construction X applied to Ce(3) ⊂ Ce(1) [i] based on
- linear OA(2513, 390625, F25, 4) (dual of [390625, 390612, 5]-code), using an extension Ce(3) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,3], and designed minimum distance d ≥ |I|+1 = 4 [i]
- linear OA(255, 390625, F25, 2) (dual of [390625, 390620, 3]-code), using an extension Ce(1) of the primitive narrow-sense BCH-code C(I) with length 390624 = 254−1, defining interval I = [1,1], and designed minimum distance d ≥ |I|+1 = 2 [i]
- linear OA(251, 9, F25, 1) (dual of [9, 8, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(251, s, F25, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(3) ⊂ Ce(1) [i] based on
- OA 2-folding and stacking [i] based on linear OA(2514, 390634, F25, 4) (dual of [390634, 390620, 5]-code), using
- net defined by OOA [i] based on linear OOA(2514, 195317, F25, 4, 4) (dual of [(195317, 4), 781254, 5]-NRT-code), using
- digital (0, 0, 195317)-net over F25, using
(21−4, 21, large)-Net over F25 — Digital
Digital (17, 21, large)-net over F25, using
- t-expansion [i] based on digital (16, 21, large)-net over F25, using
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(2521, large, F25, 5) (dual of [large, large−21, 6]-code), using
- the expurgated narrow-sense BCH-code C(I) with length 9765626 | 2510−1, defining interval I = [0,2], and minimum distance d ≥ |{−2,−1,0,1,2}|+1 = 6 (BCH-bound) [i]
- embedding of OOA with Gilbert–VarÅ¡amov bound [i] based on linear OA(2521, large, F25, 5) (dual of [large, large−21, 6]-code), using
(21−4, 21, large)-Net in Base 25 — Upper bound on s
There is no (17, 21, large)-net in base 25, because
- 2 times m-reduction [i] would yield (17, 19, large)-net in base 25, but