MinT - Best Known (21, 21+47, s)-Nets in Base 128

Best Known (21, 21+47, s)-Nets in Base 128

(21, 21+47, 288)-Net over F₁₂₈ — Constructive and digital

Digital (21, 68, 288)-net over F₁₂₈, using

t-expansion [i] based on digital (9, 68, 288)-net over F₁₂₈, using
- net from sequence [i] based on digital (9, 287)-sequence over F₁₂₈, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₁₂₈ with g(F) = 9 and N(F) ≥ 288, using
    - a function field by SÃ©mirat [i]

(21, 21+47, 386)-Net over F₁₂₈ — Digital

Digital (21, 68, 386)-net over F₁₂₈, using

t-expansion [i] based on digital (15, 68, 386)-net over F₁₂₈, using
- net from sequence [i] based on digital (15, 385)-sequence over F₁₂₈, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₁₂₈ with g(F) = 15 and N(F) ≥ 386, using
    - a curve from the manYPoints database [i]

(21, 21+47, 513)-Net in Base 128

(21, 68, 513)-net in base 128, using

t-expansion [i] based on (17, 68, 513)-net in base 128, using
- 4 times m-reduction [i] based on (17, 72, 513)-net in base 128, using
  - base change [i] based on digital (8, 63, 513)-net over F₂₅₆, using
    - net from sequence [i] based on digital (8, 512)-sequence over F₂₅₆, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₂₅₆ with g(F) = 8 and N(F) ≥ 513, using
        K_1,1 from the tower of function fields by Niederreiter and Xing based on the tower by GarcÃa and Stichtenoth over F₂₅₆ [i]

(21, 21+47, 102093)-Net in Base 128 — Upper bound on s

There is no (21, 68, 102094)-net in base 128, because

1 times m-reduction [i] would yield (21, 67, 102094)-net in base 128, but
- the generalized Rao bound for nets shows that 128^mÂ â‰¥ 1524 368864 556303 903717 309811 504000 337384 549636 117561 898040 781392 695338 230080 895399 722473 282765 837044 896593 931859 895286 873900 924580 176173 332720 > 128⁶⁷ [i]