MinT - Best Known (33−6, 33, s)-Nets in Base 25

Best Known (33−6, 33, s)-Nets in Base 25

(33−6, 33, 3188076)-Net over F₂₅ — Constructive and digital

Digital (27, 33, 3188076)-net over F₂₅, using

(u,Â u+v)-construction [i] based on
1. digital (4, 7, 391875)-net over F₂₅, using
  - net defined by OOA [i] based on linear OOA(25⁷, 391875, F₂₅, 3, 3) (dual of [(391875, 3), 1175618, 4]-NRT-code), using
    - appending kth column [i] based on linear OOA(25⁷, 391875, F₂₅, 2, 3) (dual of [(391875, 2), 783743, 4]-NRT-code), using
      - OAs with strength 3, bÂ â‰ Â 2, and mÂ >Â 3 are always embeddable [i] based on linear OA(25⁷, 391875, F₂₅, 3) (dual of [391875, 391868, 4]-code or 391875-cap in PG(6,25)), using
        product of two caps with tangent hyperplane [i]
2. digital (20, 26, 2796201)-net over F₂₅, using
  - net defined by OOA [i] based on linear OOA(25²⁶, 2796201, F₂₅, 6, 6) (dual of [(2796201, 6), 16777180, 7]-NRT-code), using
    - OA 3-folding and stacking [i] based on linear OA(25²⁶, large, F₂₅, 6) (dual of [large, large−26, 7]-code), using
      - the primitive expurgated narrow-sense BCH-code C(I) with length 9765624Â = 25⁵âˆ’1, defining interval IÂ =Â [0,5], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 7 [i]

(33−6, 33, large)-Net over F₂₅ — Digital

Digital (27, 33, large)-net over F₂₅, using

25² times duplication [i] based on digital (25, 31, large)-net over F₂₅, using
- t-expansion [i] based on digital (24, 31, large)-net over F₂₅, using
  - embedding of OOA with Gilbertâ€“VarÅ¡amov bound [i] based on linear OA(25³¹, large, F₂₅, 7) (dual of [large, large−31, 8]-code), using
    - the expurgated narrow-sense BCH-code C(I) with length 9765626Â | 25¹⁰âˆ’1, defining interval IÂ =Â [0,3], and minimum distance dÂ â‰¥ |{−3,−2,…,3}|+1Â =Â 8 (BCH-bound) [i]

(33−6, 33, large)-Net in Base 25 — Upper bound on s

There is no (27, 33, large)-net in base 25, because

4 times m-reduction [i] would yield (27, 29, large)-net in base 25, but
- mutually orthogonal hypercube bound [i]