MinT - Best Known (250−164, 250, s)-Nets in Base 3

Best Known (250−164, 250, s)-Nets in Base 3

(250−164, 250, 61)-Net over F₃ — Constructive and digital

Digital (86, 250, 61)-net over F₃, using

net from sequence [i] based on digital (86, 60)-sequence over F₃, using
- base reduction for sequences [i] based on digital (13, 60)-sequence over F₉, using
  - s-reduction based on digital (13, 63)-sequence over F₉, using
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₉ with g(F) = 13 and N(F) ≥ 64, using
      - a function field by GarcÃa and Quoos [i]

(250−164, 250, 84)-Net over F₃ — Digital

Digital (86, 250, 84)-net over F₃, using

t-expansion [i] based on digital (71, 250, 84)-net over F₃, using
- net from sequence [i] based on digital (71, 83)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 71 and N(F) ≥ 84, using
    - algebraic function fields over â„¤₃ by Niederreiter/Xing [i]

(250−164, 250, 280)-Net over F₃ — Upper bound on s (digital)

There is no digital (86, 250, 281)-net over F₃, because

2 times m-reduction [i] would yield digital (86, 248, 281)-net over F₃, but
- extracting embedded orthogonal array [i] would yield linear OA(3²⁴⁸, 281, F₃, 162) (dual of [281, 33, 163]-code), but
  - residual code [i] would yield OA(3⁸⁶, 118, S₃, 54), but
    - the linear programming bound shows that MÂ â‰¥ 45701 949395 937920 998380 846258 431667 611949 437892 667647 676231 147527 / 421027 592046 440957 546375 > 3⁸⁶ [i]

(250−164, 250, 370)-Net in Base 3 — Upper bound on s

There is no (86, 250, 371)-net in base 3, because

the generalized Rao bound for nets shows that 3^mÂ â‰¥ 209811 187892 270787 568972 931739 554038 532082 832351 277534 267485 909931 973860 029839 460043 138236 769229 929923 867120 574060 452069 > 3²⁵⁰ [i]