MinT - Best Known (195, 195+43, s)-Nets in Base 3

Best Known (195, 195+43, s)-Nets in Base 3

(195, 195+43, 1480)-Net over F₃ — Constructive and digital

Digital (195, 238, 1480)-net over F₃, using

3² times duplication [i] based on digital (193, 236, 1480)-net over F₃, using
- trace code for nets [i] based on digital (16, 59, 370)-net over F₈₁, using
  - net from sequence [i] based on digital (16, 369)-sequence over F₈₁, using
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₈₁ with g(F) = 16 and N(F) ≥ 370, using
      - a function field by GarcÃa and Quoos [i]

(195, 195+43, 4583)-Net over F₃ — Digital

Digital (195, 238, 4583)-net over F₃, using

embedding of OOA with Gilbertâ€“VarÅ¡amov bound [i] based on linear OA(3²³⁸, 4583, F₃, 43) (dual of [4583, 4345, 44]-code), using
- discarding factors / shortening the dual code based on linear OA(3²³⁸, 6607, F₃, 43) (dual of [6607, 6369, 44]-code), using
  - 2 times code embedding in larger space [i] based on linear OA(3²³⁶, 6605, F₃, 43) (dual of [6605, 6369, 44]-code), using
    - constructionÂ X applied to C([0,21]) âŠ‚ C([0,18]) [i] based on
      1. linear OA(3²²⁵, 6562, F₃, 43) (dual of [6562, 6337, 44]-code), using the expurgated narrow-sense BCH-code C(I) with length 6562Â | 3¹⁶âˆ’1, defining interval IÂ =Â [0,21], and minimum distance dÂ â‰¥ |{−21,−20,…,21}|+1Â =Â 44 (BCH-bound) [i]
      2. linear OA(3¹⁹³, 6562, F₃, 37) (dual of [6562, 6369, 38]-code), using the expurgated narrow-sense BCH-code C(I) with length 6562Â | 3¹⁶âˆ’1, defining interval IÂ =Â [0,18], and minimum distance dÂ â‰¥ |{−18,−17,…,18}|+1Â =Â 38 (BCH-bound) [i]
      3. linear OA(3¹¹, 43, F₃, 5) (dual of [43, 32, 6]-code), using
        discarding factors / shortening the dual code based on linear OA(3¹¹, 85, F₃, 5) (dual of [85, 74, 6]-code), using
        codes constructed by inverting constructionÂ Y₁ [i]

(195, 195+43, 1052224)-Net in Base 3 — Upper bound on s

There is no (195, 238, 1052225)-net in base 3, because

1 times m-reduction [i] would yield (195, 237, 1052225)-net in base 3, but
- the generalized Rao bound for nets shows that 3^mÂ â‰¥ 119603 700198 184350 220982 047221 846822 804882 295566 264116 013246 847332 305186 567989 006704 569130 246320 284952 951288 713011 > 3²³⁷ [i]