MinT - Best Known (81, 81+147, s)-Nets in Base 4

Best Known (81, 81+147, s)-Nets in Base 4

(81, 81+147, 104)-Net over F₄ — Constructive and digital

Digital (81, 228, 104)-net over F₄, using

t-expansion [i] based on digital (73, 228, 104)-net over F₄, using
- net from sequence [i] based on digital (73, 103)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 73 and N(F) ≥ 104, using
    - F₆ from the tower of function fields by GarcÃa and Stichtenoth over F₄ [i]

(81, 81+147, 129)-Net over F₄ — Digital

Digital (81, 228, 129)-net over F₄, using

net from sequence [i] based on digital (81, 128)-sequence over F₄, using
- Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 81 and N(F) ≥ 129, using
  - Drinfeld modules of rank 1 [i]

(81, 81+147, 637)-Net in Base 4 — Upper bound on s

There is no (81, 228, 638)-net in base 4, because

1 times m-reduction [i] would yield (81, 227, 638)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 51211 477883 690901 998761 293928 176065 461260 273064 024106 681158 641574 825785 345102 727456 287101 660498 555165 172499 965788 410109 909396 516115 220885 > 4²²⁷ [i]