MinT - Best Known (147−81, 147, s)-Nets in Base 4

Best Known (147−81, 147, s)-Nets in Base 4

(147−81, 147, 66)-Net over F₄ — Constructive and digital

Digital (66, 147, 66)-net over F₄, using

t-expansion [i] based on digital (49, 147, 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]

(147−81, 147, 99)-Net over F₄ — Digital

Digital (66, 147, 99)-net over F₄, using

t-expansion [i] based on digital (61, 147, 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]

(147−81, 147, 795)-Net in Base 4 — Upper bound on s

There is no (66, 147, 796)-net in base 4, because

1 times m-reduction [i] would yield (66, 146, 796)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 7973 491716 226522 431902 885280 330347 440665 321854 791076 564639 564020 848260 849063 194274 909512 > 4¹⁴⁶ [i]