MinT - Best Known (181, 181+19, s)-Nets in Base 3

Best Known (181, 181+19, s)-Nets in Base 3

(181, 181+19, 932092)-Net over F₃ — Constructive and digital

Digital (181, 200, 932092)-net over F₃, using

(u,Â u+v)-construction [i] based on
1. digital (10, 19, 26)-net over F₃, using
  - (u,Â u+v)-construction [i] based on
    1. digital (2, 6, 14)-net over F₃, using
      - linear code embedding found in a computer search [i]
    2. digital (4, 13, 13)-net over F₃, using
      - a shift-net [i]
2. digital (162, 181, 932066)-net over F₃, using
  - net defined by OOA [i] based on linear OOA(3¹⁸¹, 932066, F₃, 19, 19) (dual of [(932066, 19), 17709073, 20]-NRT-code), using
    - OOA 9-folding and stacking with additional row [i] based on linear OA(3¹⁸¹, 8388595, F₃, 19) (dual of [8388595, 8388414, 20]-code), using
      - discarding factors / shortening the dual code based on linear OA(3¹⁸¹, large, F₃, 19) (dual of [large, large−181, 20]-code), using
        the expurgated narrow-sense BCH-code C(I) with length 14348908Â | 3³⁰âˆ’1, defining interval IÂ =Â [0,9], and minimum distance dÂ â‰¥ |{−9,−8,…,9}|+1Â =Â 20 (BCH-bound) [i]

(181, 181+19, 2796227)-Net over F₃ — Digital

Digital (181, 200, 2796227)-net over F₃, using

embedding of OOA with Gilbertâ€“VarÅ¡amov bound [i] based on linear OOA(3²⁰⁰, 2796227, F₃, 3, 19) (dual of [(2796227, 3), 8388481, 20]-NRT-code), using
- (u,Â u+v)-construction [i] based on
  1. linear OOA(3¹⁹, 26, F₃, 3, 9) (dual of [(26, 3), 59, 10]-NRT-code), using
    - (u,Â u+v)-construction [i] based on
      1. linear OOA(3⁶, 14, F₃, 3, 4) (dual of [(14, 3), 36, 5]-NRT-code), using
        extracting embedded OOA [i] based on digital (2, 6, 14)-net over F₃, using
        linear code embedding found in a computer search [i]
      2. linear OOA(3¹³, 13, F₃, 3, 9) (dual of [(13, 3), 26, 10]-NRT-code), using
        extracting embedded OOA [i] based on digital (4, 13, 13)-net over F₃, using
        a shift-net [i]
  2. linear OOA(3¹⁸¹, 2796201, F₃, 3, 19) (dual of [(2796201, 3), 8388422, 20]-NRT-code), using
    - OOA 3-folding [i] based on linear OA(3¹⁸¹, large, F₃, 19) (dual of [large, large−181, 20]-code), using
      - the expurgated narrow-sense BCH-code C(I) with length 14348908Â | 3³⁰âˆ’1, defining interval IÂ =Â [0,9], and minimum distance dÂ â‰¥ |{−9,−8,…,9}|+1Â =Â 20 (BCH-bound) [i]

(181, 181+19, large)-Net in Base 3 — Upper bound on s

There is no (181, 200, large)-net in base 3, because

17 times m-reduction [i] would yield (181, 183, large)-net in base 3, but
- mutually orthogonal hypercube bound [i]