Results 41 to 50 of about 36,156 (153)

Maximal determinants and saturated D-optimal designs of orders 19 and 37 [PDF]

open access: yes, 2011
A saturated D-optimal design is a {+1,-1} square matrix of given order with maximal determinant. We search for saturated D-optimal designs of orders 19 and 37, and find that known matrices due to Smith, Cohn, Orrick and Solomon are optimal.
Brent, Richard P.   +3 more
core   +1 more source

Maximal arcs and group divisible designs [PDF]

open access: yesBulletin of the Australian Mathematical Society, 1990
The existence of maximal arcs of a certain type in symmetric designs is shown to yield semiregular group divisible designs whose duals are also semiregular group divisible. Two infinite families of such group divisible designs are constructed. The group divisible designs in these families are, in general, not symmetric.
openaire   +2 more sources

Difference Balanced Functions and Their Generalized Difference Sets [PDF]

open access: yes, 2013
Difference balanced functions from $F_{q^n}^*$ to $F_q$ are closely related to combinatorial designs and naturally define $p$-ary sequences with the ideal two-level autocorrelation.
Pott, Alexander, Wang, Qi
core  

More about Divisible Design Graphs [PDF]

open access: yes
: Divisible design graphs (DDG for short) have been recently defined by Kharaghani, Meulenberg and the second author as a generalization of (v, k, λ)-graphs.
Crnkovic, D., Haemers, W.H.
core   +1 more source

Conditions for Singular Incidence Matrices [PDF]

open access: yes
Suppose one looks for a square integral matrixN, for which NN has a prescribed form.Then the Hasse-Minkowski invariants and the determinant of NN lead to necessary conditions for existence.The Bruck-Ryser-Chowla theorem gives a famous example of such ...
Haemers, W.H.
core   +1 more source

A General Theory of Sample Complexity for Multi-Item Profit Maximization

open access: yes, 2018
The design of profit-maximizing multi-item mechanisms is a notoriously challenging problem with tremendous real-world impact. The mechanism designer's goal is to field a mechanism with high expected profit on the distribution over buyers' values ...
Balcan, Maria-Florina   +2 more
core  

Auctioning Many Divisible Goods [PDF]

open access: yes
We study the theory and practical implementation of auctioning many divisible goods. With multiple related goods, price discovery is important not only to reduce the winner’s curse, but more importantly, to simplify the bidder’s decision problem and to ...
Lawrence M. Ausubel, Peter Cramton
core  

Low dimensional strongly perfect lattices. I: The 12-dimensional case

open access: yes, 2005
It is shown that the Coxeter-Todd lattice is the unique strongly perfect lattice in dimension ...
Nebe, Gabriele, Venkov, Boris
core   +1 more source

NeuO-mediated O-acetylation of uropathogenic <i>Escherichia coli</i> K1 capsule enhances resistance to phage and neutrophil killing. [PDF]

open access: yesJ Bacteriol
Walker LL   +11 more
europepmc   +1 more source

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