MinT - Best Known (140−72, 140, s)-Nets in Base 3

Best Known (140−72, 140, s)-Nets in Base 3

(140−72, 140, 56)-Net over F₃ — Constructive and digital

Digital (68, 140, 56)-net over F₃, using

4 times m-reduction [i] based on digital (68, 144, 56)-net over F₃, using
- (u,Â u+v)-construction [i] based on
  1. digital (15, 53, 28)-net over F₃, using
    - net from sequence [i] based on digital (15, 27)-sequence over F₃, using
      - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 15 and N(F) ≥ 28, using
        an explicitly constructive algebraic function field [i]
  2. digital (15, 91, 28)-net over F₃, using
    - net from sequence [i] based on digital (15, 27)-sequence over F₃ (see above)

(140−72, 140, 72)-Net over F₃ — Digital

Digital (68, 140, 72)-net over F₃, using

t-expansion [i] based on digital (67, 140, 72)-net over F₃, using
- net from sequence [i] based on digital (67, 71)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 67 and N(F) ≥ 72, using
    - algebraic function fields over â„¤₃ by Niederreiter/Xing [i]

(140−72, 140, 477)-Net in Base 3 — Upper bound on s

There is no (68, 140, 478)-net in base 3, because

the generalized Rao bound for nets shows that 3^mÂ â‰¥ 6 544245 320045 471035 029643 101743 733892 170052 416872 113303 287798 577993 > 3¹⁴⁰ [i]