MinT - Best Known (189−105, 189, s)-Nets in Base 2

Best Known (189−105, 189, s)-Nets in Base 2

(189−105, 189, 51)-Net over F₂ — Constructive and digital

Digital (84, 189, 51)-net over F₂, using

t-expansion [i] based on digital (80, 189, 51)-net over F₂, using
- net from sequence [i] based on digital (80, 50)-sequence over F₂, using
  - Niederreiterâ€“Xing sequence constructionÂ III based on the algebraic function field F/F₂ with g(F)Â =Â 69, N(F)Â =Â 48, 1 place with degree 2, and 2 places with degree 6 [i] based on function field F/F₂ with g(F) = 69 and N(F) ≥ 48, using an explicitly constructive algebraic function field [i]

(189−105, 189, 57)-Net over F₂ — Digital

Digital (84, 189, 57)-net over F₂, using

t-expansion [i] based on digital (83, 189, 57)-net over F₂, using
- net from sequence [i] based on digital (83, 56)-sequence over F₂, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₂ with g(F) = 83 and N(F) ≥ 57, using
    - an algebraic function field by Auer [i]

(189−105, 189, 178)-Net over F₂ — Upper bound on s (digital)

There is no digital (84, 189, 179)-net over F₂, because

17 times m-reduction [i] would yield digital (84, 172, 179)-net over F₂, but
- extracting embedded orthogonal array [i] would yield linear OA(2¹⁷², 179, F₂, 88) (dual of [179, 7, 89]-code), but
  - Griesmer bound [i]

(189−105, 189, 179)-Net in Base 2 — Upper bound on s

There is no (84, 189, 180)-net in base 2, because

1 times m-reduction [i] would yield (84, 188, 180)-net in base 2, but
- the generalized Rao bound for nets shows that 2^mÂ â‰¥ 402 848628 486872 334254 432099 801260 508031 967402 650581 683168 > 2¹⁸⁸ [i]