MinT - Best Known (225−77, 225, s)-Nets in Base 4

Best Known (225−77, 225, s)-Nets in Base 4

(225−77, 225, 164)-Net over F₄ — Constructive and digital

Digital (148, 225, 164)-net over F₄, using

(u,Â u+v)-construction [i] based on
1. digital (21, 59, 34)-net over F₄, using
  - net from sequence [i] based on digital (21, 33)-sequence over F₄, using
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 21 and N(F) ≥ 34, using
      - T₅ from the second tower of function fields by GarcÃa and Stichtenoth over F₄ [i]
2. digital (89, 166, 130)-net over F₄, using
  - trace code for nets [i] based on digital (6, 83, 65)-net over F₁₆, using
    - net from sequence [i] based on digital (6, 64)-sequence over F₁₆, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₁₆ with g(F) = 6 and N(F) ≥ 65, using
        the Hermitian function field over F₁₆ [i]

(225−77, 225, 240)-Net in Base 4 — Constructive

(148, 225, 240)-net in base 4, using

3 times m-reduction [i] based on (148, 228, 240)-net in base 4, using
- trace code for nets [i] based on (34, 114, 120)-net in base 16, using
  - 1 times m-reduction [i] based on (34, 115, 120)-net in base 16, using
    - base change [i] based on digital (11, 92, 120)-net over F₃₂, using
      - net from sequence [i] based on digital (11, 119)-sequence over F₃₂, using
        Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃₂ with g(F) = 11 and N(F) ≥ 120, using
        a function field by SÃ©mirat [i]

(225−77, 225, 555)-Net over F₄ — Digital

Digital (148, 225, 555)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(225−77, 225, 17697)-Net in Base 4 — Upper bound on s

There is no (148, 225, 17698)-net in base 4, because

1 times m-reduction [i] would yield (148, 224, 17698)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 728 155156 894719 590564 135264 098433 812019 124155 539162 014474 394624 590484 988209 952907 527159 908177 895069 733087 868045 280698 800777 774092 233600 > 4²²⁴ [i]