News

April 12, 2017
The upper bound of \(A_2(8,6;4)\) could be improved from 289 to 272. Added code for \(A_2(8,3) \ge 5687\).
More details can be found: \(A_2(8,6;4) \le 272\) and \(A_2(8,3) \ge 5687\).
March 23, 2017
Added codes for \(A_2(7,3) \ge 614\), \(A_2(8,4;3) \ge 1326\), \(A_2(8,4;4) \ge 4801\), \(A_2(9,4;3) \ge 5986\), \(A_2(10,4;3) \ge 23870\), and \(A_2(11,4;3) \ge 97526\)
Dec. 9, 2016
624 nonisomorphic codes have been added for \(A_2(8,6;3)=34\)
More details can be found here.
July 11, 2016
New upper bounds for partial spreads by Esmeralda Nastase and Papa Sissokho implemented
We added the paper NastaseSissokho20162.
June 28, 2016
New upper bounds for partial spreads implemented
March 22, 2016
\(333 \le A_2(7,4;3)\)
By an exhaustive search of all symmetry groups that yield a code of size at least 329 we found: \(333 \le A_2(7,4;3)\), see HeinleinKiermaierKurzWassermann2016
Feb. 26, 2016
Statistics of the most effective lower and upper bounds introduced
We automatically rank each constraint in the CDC and MDC setting.
Feb. 7, 2016
Alexander Shishkin contributed to the homepage
Many additional informations based on the multilevel construction added, e.g., \(A_2(11,6;4)\), \(A_2(11,4;4)\), \(A_2(11,4;5)\), and \(A_2(12,4;5)\).
Feb. 6, 2016
Ivan David Molina Naizir contributed to the homepage
Additional informations on cyclic codes for: \(A_2(8,4;4)\), \(A_2(10,4;3)\), and \(A_2(10,10;5)\).
Jan. 1, 2016
First version of the manual
The manual can be found here. The preferred way to cite this homepage can be found here.
Nov. 23, 2015
\(4173 \le A_2(10,6;4)\)
A corresponding code was found in the paper HeinleinKurz2015.