MinT - Best Known (147−99, 147, s)-Nets in Base 3

Best Known (147−99, 147, s)-Nets in Base 3

(147−99, 147, 48)-Net over F₃ — Constructive and digital

Digital (48, 147, 48)-net over F₃, using

t-expansion [i] based on digital (45, 147, 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]

(147−99, 147, 56)-Net over F₃ — Digital

Digital (48, 147, 56)-net over F₃, using

t-expansion [i] based on digital (40, 147, 56)-net over F₃, using
- net from sequence [i] based on digital (40, 55)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 40 and N(F) ≥ 56, using
    - a curve from the manYPoints database [i]

(147−99, 147, 153)-Net over F₃ — Upper bound on s (digital)

There is no digital (48, 147, 154)-net over F₃, because

extracting embedded orthogonal array [i] would yield linear OA(3¹⁴⁷, 154, F₃, 99) (dual of [154, 7, 100]-code), but
- constructionÂ Y1 [i] would yield
  1. linear OA(3¹⁴⁶, 151, F₃, 99) (dual of [151, 5, 100]-code), but
    - Griesmer bound [i]
  2. linear OA(3⁷, 154, F₃, 3) (dual of [154, 147, 4]-code or 154-cap in PG(6,3)), but
    - discarding factors / shortening the dual code would yield linear OA(3⁷, 137, F₃, 3) (dual of [137, 130, 4]-code or 137-cap in PG(6,3)), but
      - a result by BarÃ¡t, Edel, Hill, and Storme [i]

(147−99, 147, 207)-Net in Base 3 — Upper bound on s

There is no (48, 147, 208)-net in base 3, because

1 times m-reduction [i] would yield (48, 146, 208)-net in base 3, but
- the generalized Rao bound for nets shows that 3^mÂ â‰¥ 5222 119428 600862 316307 616100 016168 001208 995726 942145 599359 620592 038817 > 3¹⁴⁶ [i]