MinT - Best Known (181−120, 181, s)-Nets in Base 3

Best Known (181−120, 181, s)-Nets in Base 3

(181−120, 181, 48)-Net over F₃ — Constructive and digital

Digital (61, 181, 48)-net over F₃, using

t-expansion [i] based on digital (45, 181, 48)-net over F₃, using
- net from sequence [i] based on digital (45, 47)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 45 and N(F) ≥ 48, using
    - an explicitly constructive algebraic function field [i]

(181−120, 181, 64)-Net over F₃ — Digital

Digital (61, 181, 64)-net over F₃, using

t-expansion [i] based on digital (49, 181, 64)-net over F₃, using
- net from sequence [i] based on digital (49, 63)-sequence over F₃, using
  - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₃ with g(F) = 49 and N(F) ≥ 64, using
    - a curve from the manYPoints database [i]

(181−120, 181, 198)-Net over F₃ — Upper bound on s (digital)

There is no digital (61, 181, 199)-net over F₃, because

extracting embedded orthogonal array [i] would yield linear OA(3¹⁸¹, 199, F₃, 120) (dual of [199, 18, 121]-code), but
- residual code [i] would yield OA(3⁶¹, 78, S₃, 40), but
  - the linear programming bound shows that MÂ â‰¥ 3904 915634 579720 805714 510866 149518 645975 / 27453 221324 > 3⁶¹ [i]

(181−120, 181, 263)-Net in Base 3 — Upper bound on s

There is no (61, 181, 264)-net in base 3, because

the generalized Rao bound for nets shows that 3^mÂ â‰¥ 247 467510 634544 998246 988264 791604 507813 503568 649640 806489 440740 623726 933244 102684 043073 > 3¹⁸¹ [i]