MinT - Best Known (143, 236, s)-Nets in Base 4

Best Known (143, 236, s)-Nets in Base 4

(143, 236, 138)-Net over F₄ — Constructive and digital

Digital (143, 236, 138)-net over F₄, using

5 times m-reduction [i] based on digital (143, 241, 138)-net over F₄, using
- (u,Â u+v)-construction [i] based on
  1. digital (21, 70, 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 (73, 171, 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]

(143, 236, 139)-Net in Base 4 — Constructive

(143, 236, 139)-net in base 4, using

(u,Â u+v)-construction [i] based on
1. (24, 70, 35)-net in base 4, using
  - net from sequence [i] based on (24, 34)-sequence in base 4, using
    - base expansion [i] based on digital (48, 34)-sequence over F₂, using
      - Niederreiterâ€“Xing sequence constructionÂ III based on the algebraic function field F/F₂ with g(F)Â =Â 41, N(F)Â =Â 32, 1 place with degree 2, and 2 places with degree 4 [i] based on function field F/F₂ with g(F) = 41 and N(F) ≥ 32, using an explicitly constructive algebraic function field [i]
2. digital (73, 166, 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]

(143, 236, 355)-Net over F₄ — Digital

Digital (143, 236, 355)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(143, 236, 7104)-Net in Base 4 — Upper bound on s

There is no (143, 236, 7105)-net in base 4, because

1 times m-reduction [i] would yield (143, 235, 7105)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 3053 780206 541909 972160 890690 857809 917079 194030 961303 029575 630363 239909 536757 446752 321762 027502 126286 468236 786373 970633 272751 018456 774558 966816 > 4²³⁵ [i]