MinT - Best Known (69, 69+157, s)-Nets in Base 4

Best Known (69, 69+157, s)-Nets in Base 4

(69, 69+157, 66)-Net over F₄ — Constructive and digital

Digital (69, 226, 66)-net over F₄, using

t-expansion [i] based on digital (49, 226, 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]

(69, 69+157, 99)-Net over F₄ — Digital

Digital (69, 226, 99)-net over F₄, using

t-expansion [i] based on digital (61, 226, 99)-net over F₄, using
- net from sequence [i] based on digital (61, 98)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 61 and N(F) ≥ 99, using
    - Drinfeld modules of rank 1 [i]

(69, 69+157, 481)-Net in Base 4 — Upper bound on s

There is no (69, 226, 482)-net in base 4, because

1 times m-reduction [i] would yield (69, 225, 482)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 3331 386604 662978 482610 679183 711017 960007 400390 800686 510906 430914 218203 864138 739020 708361 271610 169107 498163 303323 355747 927178 155275 139248 > 4²²⁵ [i]