MinT - Best Known (187−132, 187, s)-Nets in Base 3

Best Known (187−132, 187, s)-Nets in Base 3

(187−132, 187, 48)-Net over F₃ — Constructive and digital

Digital (55, 187, 48)-net over F₃, using

t-expansion [i] based on digital (45, 187, 48)-net over F₃, using
- net from sequence [i] based on digital (45, 47)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 45 and N(F) ≥ 48, using
    - an explicitly constructive algebraic function field [i]

(187−132, 187, 64)-Net over F₃ — Digital

Digital (55, 187, 64)-net over F₃, using

t-expansion [i] based on digital (49, 187, 64)-net over F₃, using
- net from sequence [i] based on digital (49, 63)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 49 and N(F) ≥ 64, using
    - a curve from the manYPoints database [i]

(187−132, 187, 174)-Net over F₃ — Upper bound on s (digital)

There is no digital (55, 187, 175)-net over F₃, because

21 times m-reduction [i] would yield digital (55, 166, 175)-net over F₃, but
- extracting embedded orthogonal array [i] would yield linear OA(3¹⁶⁶, 175, F₃, 111) (dual of [175, 9, 112]-code), but
  - constructionÂ Y1 [i] would yield
    1. linear OA(3¹⁶⁵, 171, F₃, 111) (dual of [171, 6, 112]-code), but
      - residual code [i] would yield linear OA(3⁵⁴, 59, F₃, 37) (dual of [59, 5, 38]-code), but
        1 times truncation [i] would yield linear OA(3⁵³, 58, F₃, 36) (dual of [58, 5, 37]-code), but
        residual code [i] would yield linear OA(3¹⁷, 21, F₃, 12) (dual of [21, 4, 13]-code), but
        â€œHNâ€ bound on codes from Brouwerâ€™s database [i]
    2. OA(3⁹, 175, S₃, 4), but
      - discarding factors would yield OA(3⁹, 100, S₃, 4), but
        the Rao or (dual) Hamming bound shows that MÂ â‰¥ 20001 > 3⁹ [i]

(187−132, 187, 178)-Net in Base 3 — Upper bound on s

There is no (55, 187, 179)-net in base 3, because

13 times m-reduction [i] would yield (55, 174, 179)-net in base 3, but
- extracting embedded orthogonal array [i] would yield OA(3¹⁷⁴, 179, S₃, 119), but
  - the (dual) Plotkin bound shows that MÂ â‰¥ 2 821383 260958 014531 084804 730393 168953 719437 088977 599878 666724 657220 634716 408631 037763 / 20 > 3¹⁷⁴ [i]