Best Known (12, s)-Sequences in Base 3
(12, 19)-Sequence over F3 — Constructive and digital
Digital (12, 19)-sequence over F3, using
- t-expansion [i] based on digital (11, 19)-sequence over F3, using
- Niederreiter–Xing sequence construction III based on the algebraic function field F/F3 with g(F) = 9, N(F) = 19, and 1 place with degree 3 [i] based on function field F/F3 with g(F) = 9 and N(F) ≥ 19, using an explicitly constructive algebraic function field [i]
(12, 21)-Sequence over F3 — Digital
Digital (12, 21)-sequence over F3, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F3 with g(F) = 12 and N(F) ≥ 22, using
(12, 32)-Sequence in Base 3 — Upper bound on s
There is no (12, 33)-sequence in base 3, because
- net from sequence [i] would yield (12, m, 34)-net in base 3 for arbitrarily large m, but
- m-reduction [i] would yield (12, 97, 34)-net in base 3, but
- extracting embedded OOA [i] would yield OOA(397, 34, S3, 3, 85), but
- the (dual) Plotkin bound for OOAs shows that M ≥ 858962 534553 352218 394101 882942 702121 170179 203335 / 43 > 397 [i]
- extracting embedded OOA [i] would yield OOA(397, 34, S3, 3, 85), but
- m-reduction [i] would yield (12, 97, 34)-net in base 3, but