MinT - Best Known (250−90, 250, s)-Nets in Base 4

Best Known (250−90, 250, s)-Nets in Base 4

(250−90, 250, 160)-Net over F₄ — Constructive and digital

Digital (160, 250, 160)-net over F₄, using

t-expansion [i] based on digital (157, 250, 160)-net over F₄, using
- 9 times m-reduction [i] based on digital (157, 259, 160)-net over F₄, using
  - (u,Â u+v)-construction [i] based on
    1. digital (33, 84, 56)-net over F₄, using
      - net from sequence [i] based on digital (33, 55)-sequence over F₄, using
        Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 33 and N(F) ≥ 56, using
        F₅ from the tower of function fields by GarcÃa and Stichtenoth over F₄ [i]
    2. digital (73, 175, 104)-net over F₄, using
      - net from sequence [i] based on digital (73, 103)-sequence over F₄, using
        Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 73 and N(F) ≥ 104, using
        F₆ from the tower of function fields by GarcÃa and Stichtenoth over F₄ [i]

(250−90, 250, 208)-Net in Base 4 — Constructive

(160, 250, 208)-net in base 4, using

t-expansion [i] based on (159, 250, 208)-net in base 4, using
- trace code for nets [i] based on (34, 125, 104)-net in base 16, using
  - base change [i] based on digital (9, 100, 104)-net over F₃₂, using
    - net from sequence [i] based on digital (9, 103)-sequence over F₃₂, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃₂ with g(F) = 9 and N(F) ≥ 104, using
        a function field by SÃ©mirat [i]

(250−90, 250, 510)-Net over F₄ — Digital

Digital (160, 250, 510)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(250−90, 250, 12959)-Net in Base 4 — Upper bound on s

There is no (160, 250, 12960)-net in base 4, because

the generalized Rao bound for nets shows that 4^mÂ â‰¥ 3 277361 776682 348651 530097 811539 355108 541797 064158 336475 403111 615686 377673 240648 078075 554600 441003 544054 484432 121620 847464 952001 994391 140291 590779 131812 > 4²⁵⁰ [i]