MinT - Best Known (189−127, 189, s)-Nets in Base 4

Best Known (189−127, 189, s)-Nets in Base 4

(189−127, 189, 66)-Net over F₄ — Constructive and digital

Digital (62, 189, 66)-net over F₄, using

t-expansion [i] based on digital (49, 189, 66)-net over F₄, using
- net from sequence [i] based on digital (49, 65)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 49 and N(F) ≥ 66, using
    - T₆ from the second tower of function fields by GarcÃa and Stichtenoth over F₄ [i]

(189−127, 189, 99)-Net over F₄ — Digital

Digital (62, 189, 99)-net over F₄, using

t-expansion [i] based on digital (61, 189, 99)-net over F₄, using
- net from sequence [i] based on digital (61, 98)-sequence over F₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 61 and N(F) ≥ 99, using
    - Drinfeld modules of rank 1 [i]

(189−127, 189, 457)-Net in Base 4 — Upper bound on s

There is no (62, 189, 458)-net in base 4, because

1 times m-reduction [i] would yield (62, 188, 458)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 171627 316530 720518 190203 814292 054632 868798 872587 042840 007277 841953 090017 210925 742367 050387 686169 716075 238818 957600 > 4¹⁸⁸ [i]