MinT - Best Known (219−121, 219, s)-Nets in Base 4

Best Known (219−121, 219, s)-Nets in Base 4

(219−121, 219, 104)-Net over F₄ — Constructive and digital

Digital (98, 219, 104)-net over F₄, using

t-expansion [i] based on digital (73, 219, 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]

(219−121, 219, 144)-Net over F₄ — Digital

Digital (98, 219, 144)-net over F₄, using

t-expansion [i] based on digital (91, 219, 144)-net over F₄, using
- net from sequence [i] based on digital (91, 143)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 91 and N(F) ≥ 144, using
    - Drinfeld modules of rank 1 [i]

(219−121, 219, 1141)-Net in Base 4 — Upper bound on s

There is no (98, 219, 1142)-net in base 4, because

1 times m-reduction [i] would yield (98, 218, 1142)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 180264 910430 588565 775021 225487 987004 732076 991913 032079 876414 855700 811980 284254 923779 808935 159752 343360 461696 229916 698466 383394 389160 > 4²¹⁸ [i]