Best Known (21−19, 21, s)-Nets in Base 81
(21−19, 21, 116)-Net over F81 — Constructive and digital
Digital (2, 21, 116)-net over F81, using
- net from sequence [i] based on digital (2, 115)-sequence over F81, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F81 with g(F) = 2 and N(F) ≥ 116, using
(21−19, 21, 118)-Net over F81 — Digital
Digital (2, 21, 118)-net over F81, using
- net from sequence [i] based on digital (2, 117)-sequence over F81, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F81 with g(F) = 2 and N(F) ≥ 118, using
(21−19, 21, 898)-Net in Base 81 — Upper bound on s
There is no (2, 21, 899)-net in base 81, because
- 1 times m-reduction [i] would yield (2, 20, 899)-net in base 81, but
- the generalized Rao bound for nets shows that 81m ≥ 147 810531 442345 581029 101847 902949 767281 > 8120 [i]