MinT - Best Known (186−131, 186, s)-Nets in Base 4

Best Known (186−131, 186, s)-Nets in Base 4

(186−131, 186, 66)-Net over F₄ — Constructive and digital

Digital (55, 186, 66)-net over F₄, using

t-expansion [i] based on digital (49, 186, 66)-net over F₄, using
- net from sequence [i] based on digital (49, 65)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 49 and N(F) ≥ 66, using
    - T₆ from the second tower of function fields by GarcÃa and Stichtenoth over F₄ [i]

(186−131, 186, 91)-Net over F₄ — Digital

Digital (55, 186, 91)-net over F₄, using

t-expansion [i] based on digital (50, 186, 91)-net over F₄, using
- net from sequence [i] based on digital (50, 90)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 50 and N(F) ≥ 91, using
    - a curve from the manYPoints database [i]

(186−131, 186, 380)-Net in Base 4 — Upper bound on s

There is no (55, 186, 381)-net in base 4, because

1 times m-reduction [i] would yield (55, 185, 381)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 2636 434619 853040 054890 492355 346355 868751 908089 320354 370231 289623 701031 617332 882575 920182 368820 593513 073990 682248 > 4¹⁸⁵ [i]