MinT - Best Known (4, 4+20, s)-Nets in Base 64

Best Known (4, 4+20, s)-Nets in Base 64

(4, 4+20, 104)-Net over F₆₄ — Constructive and digital

Digital (4, 24, 104)-net over F₆₄, using

t-expansion [i] based on digital (3, 24, 104)-net over F₆₄, using
- net from sequence [i] based on digital (3, 103)-sequence over F₆₄, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₆₄ with g(F) = 3 and N(F) ≥ 104, using
    - a function field by SÃ©mirat [i]

(4, 4+20, 129)-Net in Base 64 — Constructive

(4, 24, 129)-net in base 64, using

4 times m-reduction [i] based on (4, 28, 129)-net in base 64, using
- base change [i] based on digital (0, 24, 129)-net over F₁₂₈, using
  - net from sequence [i] based on digital (0, 128)-sequence over F₁₂₈, using
    - generalized Faure sequence [i]
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₁₂₈ with g(F) = 0 and N(F) ≥ 129, using
      - the rational function field F₁₂₈(x) [i]
    - Niederreiter sequence [i]

(4, 4+20, 129)-Net over F₆₄ — Digital

Digital (4, 24, 129)-net over F₆₄, using

net from sequence [i] based on digital (4, 128)-sequence over F₆₄, using
- Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₆₄ with g(F) = 4 and N(F) ≥ 129, using
  - K_1,1 from the tower of function fields by Niederreiter and Xing based on the tower by GarcÃa and Stichtenoth over F₆₄ [i]

(4, 4+20, 1549)-Net in Base 64 — Upper bound on s

There is no (4, 24, 1550)-net in base 64, because

the generalized Rao bound for nets shows that 64^mÂ â‰¥ 22 386409 705398 547670 516689 177545 215412 818206 > 64²⁴ [i]