MinT - Best Known (238−141, 238, s)-Nets in Base 4

Best Known (238−141, 238, s)-Nets in Base 4

(238−141, 238, 104)-Net over F₄ — Constructive and digital

Digital (97, 238, 104)-net over F₄, using

t-expansion [i] based on digital (73, 238, 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]

(238−141, 238, 144)-Net over F₄ — Digital

Digital (97, 238, 144)-net over F₄, using

t-expansion [i] based on digital (91, 238, 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]

(238−141, 238, 922)-Net in Base 4 — Upper bound on s

There is no (97, 238, 923)-net in base 4, because

1 times m-reduction [i] would yield (97, 237, 923)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 49265 391654 924303 322762 838327 408705 882224 380329 780950 629507 084278 093484 352450 717409 426971 020855 822510 659181 189814 878219 199424 379587 369098 552300 > 4²³⁷ [i]