MinT - Best Known (68, 68+100, s)-Nets in Base 4

Best Known (68, 68+100, s)-Nets in Base 4

(68, 68+100, 66)-Net over F₄ — Constructive and digital

Digital (68, 168, 66)-net over F₄, using

t-expansion [i] based on digital (49, 168, 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]

(68, 68+100, 99)-Net over F₄ — Digital

Digital (68, 168, 99)-net over F₄, using

t-expansion [i] based on digital (61, 168, 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]

(68, 68+100, 644)-Net in Base 4 — Upper bound on s

There is no (68, 168, 645)-net in base 4, because

the generalized Rao bound for nets shows that 4^mÂ â‰¥ 146360 000367 077092 690150 223964 288545 784616 560143 289931 091228 213826 541367 991175 969139 263045 132819 290736 > 4¹⁶⁸ [i]