MinT - Best Known (168−105, 168, s)-Nets in Base 4

Best Known (168−105, 168, s)-Nets in Base 4

(168−105, 168, 66)-Net over F₄ — Constructive and digital

Digital (63, 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]

(168−105, 168, 99)-Net over F₄ — Digital

Digital (63, 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]

(168−105, 168, 536)-Net in Base 4 — Upper bound on s

There is no (63, 168, 537)-net in base 4, because

1 times m-reduction [i] would yield (63, 167, 537)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 35473 903033 569001 877697 175940 310428 655137 332916 558375 223259 308406 617919 134463 511308 160161 449976 890400 > 4¹⁶⁷ [i]