MinT - Best Known (81, 81+159, s)-Nets in Base 4

Best Known (81, 81+159, s)-Nets in Base 4

(81, 81+159, 104)-Net over F₄ — Constructive and digital

Digital (81, 240, 104)-net over F₄, using

t-expansion [i] based on digital (73, 240, 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+159, 129)-Net over F₄ — Digital

Digital (81, 240, 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+159, 604)-Net in Base 4 — Upper bound on s

There is no (81, 240, 605)-net in base 4, because

1 times m-reduction [i] would yield (81, 239, 605)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 792531 581225 050828 523638 998381 118603 161589 322615 568578 416938 610254 201874 067084 797263 337676 428961 171672 654679 504508 014593 974472 851291 181122 007536 > 4²³⁹ [i]