MinT - Best Known (140, 140+82, s)-Nets in Base 4

Best Known (140, 140+82, s)-Nets in Base 4

(140, 140+82, 147)-Net over F₄ — Constructive and digital

Digital (140, 222, 147)-net over F₄, using

(u,Â u+v)-construction [i] based on
1. digital (5, 46, 17)-net over F₄, using
  - net from sequence [i] based on digital (5, 16)-sequence over F₄, using
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 5 and N(F) ≥ 17, using
      - an explicitly constructive algebraic function field [i]
2. digital (94, 176, 130)-net over F₄, using
  - trace code for nets [i] based on digital (6, 88, 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]

(140, 140+82, 152)-Net in Base 4 — Constructive

(140, 222, 152)-net in base 4, using

2 times m-reduction [i] based on (140, 224, 152)-net in base 4, using
- trace code for nets [i] based on (28, 112, 76)-net in base 16, using
  - 3 times m-reduction [i] based on (28, 115, 76)-net in base 16, using
    - base change [i] based on digital (5, 92, 76)-net over F₃₂, using
      - net from sequence [i] based on digital (5, 75)-sequence over F₃₂, using
        Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃₂ with g(F) = 5 and N(F) ≥ 76, using
        a function field by SÃ©mirat [i]

(140, 140+82, 420)-Net over F₄ — Digital

Digital (140, 222, 420)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(140, 140+82, 9755)-Net in Base 4 — Upper bound on s

There is no (140, 222, 9756)-net in base 4, because

the generalized Rao bound for nets shows that 4^mÂ â‰¥ 45 598025 420478 933681 023868 514843 114459 372127 616401 841092 798392 663228 433976 079110 388515 418696 371713 910358 904137 811058 642306 325437 323728 > 4²²² [i]