Update history
- 3 May 2007 - added reference to Gysin's construction of a D-optimal
design of order 170 to the bounds page and
to the bibliography ([Gys]. (Pointed out
by Hadi Kharaghani.)
- 13 November 2005 - added reference to [CKM1]
relating to the maximal determinant in order 18.
- 12 November 2005 - added new record in order 27,
new record in order 31, and
new record in order 59,
matrices found by Hiroki Tamura.
- 12 November 2005 - added new record in order 115 and
new record in order 119,
two-circulant constructions discovered by Tomas Rokicki.
- 10 November 2005 - added new record in order 107 and
new record in order 111,
two-circulant constructions discovered by Tomas Rokicki.
- 8 November 2005 - added new record in order 79,
new record in order 83,
new record in order 87,
new record in order 91,
new record in order 95,
new record in order 99, and
new record in order 103,
all of which are two-circulant constructions discovered by Tomas Rokicki.
- 6 November 2005 - added complete list of inequivalent maximal
determinant matrices in order 21 found by W. Orrick
[O3].
- 6 November 2005 - added additional record determinant
matrix found by W. Orrick and B. Solomon in order
19.
- 6 November 2005 - added complete list of inequivalent maximal
determinant matrices in order 17.
- 5 November 2005 - modified comments and references concerning
numbers of inequivalent designs
in orders 10, 11, and
14.
- 18 September 2005 - added references to recent work on classification of
Hadamard matrices of order 36 ([BFW]
and [O2]).
- 7 September 2005 - added new record in order 101,
discovered by Will Orrick and Bruce Solomon on December 8, 2003.
- 4 September 2005 - added new record in order 71
and new record in order 75,
two-circulant constructions discovered by Tomas Rokicki.
- 30 August 2005 - added new record in order 67,
two-circulant construction discovered by Tomas Rokicki.
- 27 August 2005 - added new record in order 59,
two-circulant construction discovered by Tomas Rokicki and independently
found by Ivan Kazmenko and Vadim Trofimov.
- 27 August 2005 - added new record in order 55,
two-circulant construction discovered by Tomas Rokicki and independently
found by Ivan Kazmenko and Vadim Trofimov and by Jean-Charles Meyrignac
and Jaroslaw Wroblewski.
- 26 April 2005 - added new record in order 51,
two-circulant construction discovered by Tomas Rokicki and independently
found by Ivan Kazmenko and Vadim Trofimov and by Jean-Charles Meyrignac
and Jaroslaw Wroblewski.
- 25 April 2005 - added new record in order 43,
two-circulant construction discovered by Tomas Rokicki and independently
found by Ivan Kazmenko and Vadim Trofimov and by Jean-Charles Meyrignac
and Jaroslaw Wroblewski.
- 24 April 2005 - added new record in order 106,
discovered by Will Orrick.
- 24 April 2005 - updated values of determinants found by Tomas
Rokicki in orders 105 and 109.
- 22 April 2005 - added new record in order 85,
discovered by Will Orrick and Bruce Solomon on December 8, 2003.
- 21 April 2005 - added new record in order 57,
discovered by Jean-Charles Meyrignac by hill climbing from a matrix
constructed by Bertram Felgenhauer during the Lars' programming contest.
- 19 April 2005 - added new record in order 35,
two-circulant construction discovered by Tomas Rokicki and independently
found by Ivan Kazmenko and Vadim Trofimov and by Jean-Charles Meyrignac
and Jaroslaw Wroblewski.
- 19 April 2005 - added new record in order 34,
two-circulant construction with border, found by Will Orrick
- 14 April 2005 - extended table to include Hadamard matrix in order
116, D-optimal design in
order 118 (Fletcher, Koukouvinos, and Seberry), and
new records found by Tomas Rokicki in orders
117 and 119. Since the latter are still in daily
flux, only stub pages were created.
- 12 April 2005 - extended table to include Hadamard matrices in orders
104, 108, and
112, Brouwer design in order
113, D-optimal designs in
orders 110 (Fletcher and Seberry) and
114 (Koukouvinos, Kounias, and Seberry), and
new records found by Tomas Rokicki in orders
105, 106, 107, 109, 111, and 115. Since the latter are still in daily
flux, only stub pages were created.
- 8 April 2005 - added new record in order 78,
Ehlich-type construction with circulant blocks discovered by Tomas
Rokicki
- 7 April 2005 - added new record in order 58,
Ehlich-type construction with circulant blocks discovered by Tomas
Rokicki and independently by Ivan Kazmenko and Vadim Trofimov
- 6 April 2005 - added new record in order 39, a
circulant matrix discovered by Tomas Rokicki
Back to maximal determinant main page.
Page created 14 April 2005.
Last modified 3 May 2007.
Comments:
maxdet@indiana.edu