MinT - Best Known (146, 243, s)-Nets in Base 4

Best Known (146, 243, s)-Nets in Base 4

(146, 243, 138)-Net over F₄ — Constructive and digital

Digital (146, 243, 138)-net over F₄, using

7 times m-reduction [i] based on digital (146, 250, 138)-net over F₄, using
- (u,Â u+v)-construction [i] based on
  1. digital (21, 73, 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, 177, 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]

(146, 243, 139)-Net in Base 4 — Constructive

(146, 243, 139)-net in base 4, using

1 times m-reduction [i] based on (146, 244, 139)-net in base 4, using
- (u,Â u+v)-construction [i] based on
  1. (24, 73, 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, 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]

(146, 243, 350)-Net over F₄ — Digital

Digital (146, 243, 350)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(146, 243, 6737)-Net in Base 4 — Upper bound on s

There is no (146, 243, 6738)-net in base 4, because

1 times m-reduction [i] would yield (146, 242, 6738)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 50 000976 006202 377219 839124 323042 838243 792555 764653 015705 862950 662049 996847 736053 129239 009050 173883 893495 847744 473294 232198 530572 346731 636841 667010 > 4²⁴² [i]