Results 41 to 50 of about 789 (94)

The maximum flow in dynamic networks [PDF]

open access: yesComputer Science Journal of Moldova, 2005
The dynamic maximum flow problem that generalizes the static maximum flow problem is formulated and studied. We consider the problem on a network with capacities depending on time, fixed transit times on the arcs, and a given time horizon.
Maria A. Fonoberova, Dmitrii D. Lozovanu
doaj  

Quickest Online Selection of an Increasing Subsequence of Specified Size [PDF]

open access: yes, 2015
Given a sequence of independent random variables with a common continuous distribution, we consider the online decision problem where one seeks to minimize the expected value of the time that is needed to complete the selection of a monotone increasing ...
Arlotto, Alessandro   +2 more
core   +3 more sources

An approximation algorithm for the generalized minimum spanning tree problem with bounded cluster size [PDF]

open access: yes, 2001
Given a complete undirected graph with the nodes partitioned into m node sets called clusters, the Generalized Minimum Spanning Tree problem denoted by GMST is to find a minimum-cost tree which includes exactly one node from each cluster.
Kern, W., Pop, P.C., Still, G.J.
core   +1 more source

Covering compact metric spaces greedily

open access: yes, 2018
A general greedy approach to construct coverings of compact metric spaces by metric balls is given and analyzed. The analysis is a continuous version of Chvatal's analysis of the greedy algorithm for the weighted set cover problem.
Rolfes, Jan Hendrik, Vallentin, Frank
core   +1 more source

Intersection cuts from multiple rows: a disjunctive programming approach

open access: yesEURO Journal on Computational Optimization, 2013
We address the issue of generating cutting planes for mixed integer programs from multiple rows of the simplex tableau with the tools of disjunctive programming.
Egon Balas, Andrea Qualizza
doaj   +1 more source

The generalized minimum spanning tree polytope and related polytopes [PDF]

open access: yes, 2001
The Generalized Minimum Spanning Tree problem denoted by GMST is a variant of the classical Minimum Spanning Tree problem in which nodes are partitioned into clusters and the problem calls for a minimum cost tree spanning at least one node from each ...
Pop, P.C.
core   +1 more source

Automatic boomerang attacks search on Rijndael

open access: yesJournal of Mathematical Cryptology
Boomerang attacks were introduced in 1999 by Wagner (The boomerang attack. In: Knudsen LR, editor. FSE’99. vol. 1636 of LNCS. Heidelberg: Springer; 1999. p.
Rouquette Loïc   +2 more
doaj   +1 more source

Formulations and exact algorithms for the distance-constrained generalized directed rural postman problem

open access: yesEURO Journal on Computational Optimization, 2017
The generalized directed rural postman problem is an arc routing problem with many interesting real-life applications, such as routing for meter reading. In this application, a vehicle with a receiver travels through a series of neighborhoods.
Thais Ávila   +3 more
doaj   +1 more source

On the theta number of powers of cycle graphs [PDF]

open access: yes, 2011
We give a closed formula for Lovasz theta number of the powers of cycle graphs and of their complements, the circular complete graphs. As a consequence, we establish that the circular chromatic number of a circular perfect graph is computable in ...
Bachoc, Christine   +2 more
core   +3 more sources

THE GROTHENDIECK CONSTANT IS STRICTLY SMALLER THAN KRIVINE’S BOUND

open access: yesForum of Mathematics, Pi, 2013
The (real) Grothendieck constant ${K}_{G} $ is the infimum over those $K\in (0, \infty )$ such that for every $m, n\in \mathbb{N} $ and every $m\times n$ real matrix $({a}_{ij} )$ we have $$\begin{eqnarray*}\displaystyle \max _{\{ x_{i}\} _{i= 1}^{m} , \{
MARK BRAVERMAN   +3 more
doaj   +1 more source

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