MinT - Best Known (142, 142+90, s)-Nets in Base 4

Best Known (142, 142+90, s)-Nets in Base 4

(142, 142+90, 138)-Net over F₄ — Constructive and digital

Digital (142, 232, 138)-net over F₄, using

6 times m-reduction [i] based on digital (142, 238, 138)-net over F₄, using
- (u,Â u+v)-construction [i] based on
  1. digital (21, 69, 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, 169, 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]

(142, 142+90, 139)-Net in Base 4 — Constructive

(142, 232, 139)-net in base 4, using

(u,Â u+v)-construction [i] based on
1. (24, 69, 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, 163, 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]

(142, 142+90, 369)-Net over F₄ — Digital

Digital (142, 232, 369)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(142, 142+90, 7427)-Net in Base 4 — Upper bound on s

There is no (142, 232, 7428)-net in base 4, because

the generalized Rao bound for nets shows that 4^mÂ â‰¥ 47 731243 478130 442991 653132 338733 370615 924650 121050 998881 945247 930157 183217 851306 087702 308627 127503 296065 516921 434228 421252 222607 687537 544640 > 4²³² [i]