MinT - Best Known (55−42, 55, s)-Nets in Base 4

Best Known (55−42, 55, s)-Nets in Base 4

(55−42, 55, 30)-Net over F₄ — Constructive and digital

Digital (13, 55, 30)-net over F₄, using

net from sequence [i] based on digital (13, 29)-sequence over F₄, using
- Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 13 and N(F) ≥ 30, using
  - F₄ from the tower of function fields by GarcÃa and Stichtenoth over F₄ [i]

(55−42, 55, 33)-Net over F₄ — Digital

Digital (13, 55, 33)-net over F₄, using

net from sequence [i] based on digital (13, 32)-sequence over F₄, using
- Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 13 and N(F) ≥ 33, using
  - Drinfeld modules of rank 1 [i]

(55−42, 55, 58)-Net over F₄ — Upper bound on s (digital)

There is no digital (13, 55, 59)-net over F₄, because

2 times m-reduction [i] would yield digital (13, 53, 59)-net over F₄, but
- extracting embedded orthogonal array [i] would yield linear OA(4⁵³, 59, F₄, 40) (dual of [59, 6, 41]-code), but
  - residual code [i] would yield linear OA(4¹³, 18, F₄, 10) (dual of [18, 5, 11]-code), but
    - â€œLizâ€ bound on codes from Brouwerâ€™s database [i]

(55−42, 55, 62)-Net in Base 4 — Upper bound on s

There is no (13, 55, 63)-net in base 4, because

1 times m-reduction [i] would yield (13, 54, 63)-net in base 4, but
- extracting embedded orthogonal array [i] would yield OA(4⁵⁴, 63, S₄, 41), but
  - the linear programming bound shows that MÂ â‰¥ 3 354223 770613 498648 030700 628676 182016 / 8085 > 4⁵⁴ [i]