MinT - Best Known (189−120, 189, s)-Nets in Base 4

Best Known (189−120, 189, s)-Nets in Base 4

(189−120, 189, 66)-Net over F₄ — Constructive and digital

Digital (69, 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]

(189−120, 189, 99)-Net over F₄ — Digital

Digital (69, 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]

(189−120, 189, 561)-Net in Base 4 — Upper bound on s

There is no (69, 189, 562)-net in base 4, because

the generalized Rao bound for nets shows that 4^mÂ â‰¥ 673100 680064 376003 364574 436368 274654 841945 270947 821125 177635 971805 499344 403048 517963 995052 979064 555186 674900 651904 > 4¹⁸⁹ [i]