MinT - Best Known (138−75, 138, s)-Nets in Base 4

Best Known (138−75, 138, s)-Nets in Base 4

(138−75, 138, 66)-Net over F₄ — Constructive and digital

Digital (63, 138, 66)-net over F₄, using

t-expansion [i] based on digital (49, 138, 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]

(138−75, 138, 99)-Net over F₄ — Digital

Digital (63, 138, 99)-net over F₄, using

t-expansion [i] based on digital (61, 138, 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]

(138−75, 138, 798)-Net in Base 4 — Upper bound on s

There is no (63, 138, 799)-net in base 4, because

1 times m-reduction [i] would yield (63, 137, 799)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 31595 890789 856184 636614 781660 312858 618495 704112 921502 937550 282571 270202 519157 260080 > 4¹³⁷ [i]