MinT - Best Known (220−143, 220, s)-Nets in Base 4

Best Known (220−143, 220, s)-Nets in Base 4

(220−143, 220, 104)-Net over F₄ — Constructive and digital

Digital (77, 220, 104)-net over F₄, using

t-expansion [i] based on digital (73, 220, 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]

(220−143, 220, 112)-Net over F₄ — Digital

Digital (77, 220, 112)-net over F₄, using

t-expansion [i] based on digital (73, 220, 112)-net over F₄, using
- net from sequence [i] based on digital (73, 111)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 73 and N(F) ≥ 112, using
    - Drinfeld modules of rank 1 [i]

(220−143, 220, 597)-Net in Base 4 — Upper bound on s

There is no (77, 220, 598)-net in base 4, because

1 times m-reduction [i] would yield (77, 219, 598)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 771455 161625 021313 420836 279471 433077 212351 273056 252539 476317 035766 399619 606035 241874 223511 552097 405809 139307 159805 518685 424226 170200 > 4²¹⁹ [i]