MinT - Best Known (138, 138+49, s)-Nets in Base 4

Best Known (138, 138+49, s)-Nets in Base 4

(138, 138+49, 531)-Net over F₄ — Constructive and digital

Digital (138, 187, 531)-net over F₄, using

t-expansion [i] based on digital (137, 187, 531)-net over F₄, using
- 8 times m-reduction [i] based on digital (137, 195, 531)-net over F₄, using
  - trace code for nets [i] based on digital (7, 65, 177)-net over F₆₄, using
    - net from sequence [i] based on digital (7, 176)-sequence over F₆₄, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₆₄ with g(F) = 7 and N(F) ≥ 177, using
        a function field by GarcÃa and Quoos [i]

(138, 138+49, 576)-Net in Base 4 — Constructive

(138, 187, 576)-net in base 4, using

2 times m-reduction [i] based on (138, 189, 576)-net in base 4, using
- trace code for nets [i] based on (12, 63, 192)-net in base 64, using
  - base change [i] based on digital (3, 54, 192)-net over F₁₂₈, using
    - net from sequence [i] based on digital (3, 191)-sequence over F₁₂₈, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₁₂₈ with g(F) = 3 and N(F) ≥ 192, using
        a function field by SÃ©mirat [i]

(138, 138+49, 1408)-Net over F₄ — Digital

Digital (138, 187, 1408)-net over F₄, using

Gilbertâ€“VarÅ¡amov bound [i]

(138, 138+49, 151408)-Net in Base 4 — Upper bound on s

There is no (138, 187, 151409)-net in base 4, because

1 times m-reduction [i] would yield (138, 186, 151409)-net in base 4, but
- the generalized Rao bound for nets shows that 4^mÂ â‰¥ 9620 270109 206882 870153 787150 799271 324340 382325 019977 810470 597766 544604 029574 087283 607719 492425 114334 522525 156356 > 4¹⁸⁶ [i]