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» A class of combinatorial identities
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DM
2008
125views more  DM 2008»
15 years 6 months ago
Difference systems of sets and cyclotomy
Difference Systems of Sets (DSS) are combinatorial configurations that arise in connection with code synchronization. A method for the construction of DSS from partitions of cycli...
Yukiyasu Mutoh, Vladimir D. Tonchev
DM
1998
66views more  DM 1998»
15 years 5 months ago
Steep polyominoes, q-Motzkin numbers and q-Bessel functions
We introduce three deÿnitions of q-analogs of Motzkin numbers and illustrate some combinatorial interpretations of these q-numbers. We relate the ÿrst class of q-numbers to the ...
Elena Barcucci, Alberto Del Lungo, Jean-Marc Fedou...
SWAT
2010
Springer
204views Algorithms» more  SWAT 2010»
15 years 4 months ago
Feasible and Accurate Algorithms for Covering Semidefinite Programs
In this paper we describe an algorithm to approximately solve a class of semidefinite programs called covering semidefinite programs. This class includes many semidefinite programs...
Garud Iyengar, David J. Phillips, Clifford Stein
ANOR
2011
131views more  ANOR 2011»
15 years 1 months ago
A branch-and-bound algorithm for hard multiple knapsack problems
Abstract The multiple knapsack problem (MKP) is a classical combinatorial optimization problem. A recent algorithm for some classes of the MKP is bin-completion, a bin-oriented, br...
Alex S. Fukunaga
DM
2011
158views Education» more  DM 2011»
14 years 9 months ago
A survey of homogeneous structures
A relational first order structure is homogeneous if it is countable (possibly finite) and every isomorphism between finite substructures extends to an automorphism. This artic...
Dugald Macpherson