Results 31 to 40 of about 129,306 (313)

Efficient Subspace Approximation Algorithms [PDF]

open access: yesDiscrete & Computational Geometry, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nariankadu D. Shyamalkumar   +1 more
openaire   +2 more sources

Connected bin packing problem on traceable graphs [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2022
We consider a new extension of the bin packing problem in which a set of connectivity constraints should be satisfied. An undirected graph with a weight function on the nodes is given.
A. Nejoomi, A. Dolati
doaj   +1 more source

Approximation algorithms and inapproximability of partition functions of spin systems

open access: yes, 2020
Over the past 30 years, the study of counting problems has become an interesting and important work. The framework of counting problems can capture applications in diverse fields, such as graph colouring and homomorphism in graph theory, and the Ising ...
Yang, Kuan
core   +1 more source

Coresets for the Average Case Error for Finite Query Sets

open access: yesSensors, 2021
Coreset is usually a small weighted subset of an input set of items, that provably approximates their loss function for a given set of queries (models, classifiers, hypothesis). That is, the maximum (worst-case) error over all queries is bounded.
Alaa Maalouf   +3 more
doaj   +1 more source

New Bipartite Graph Techniques for Irregular Data Redistribution Scheduling

open access: yesAlgorithms, 2019
For many parallel and distributed systems, automatic data redistribution improves its locality and increases system performance for various computer problems and applications.
Qinghai Li, Chang Wu Yu
doaj   +1 more source

The AAA Algorithm for Rational Approximation [PDF]

open access: yesSIAM Journal on Scientific Computing, 2018
We introduce a new algorithm for approximation by rational functions on a real or complex set of points, implementable in 40 lines of Matlab and requiring no user input parameters. Even on a disk or interval the algorithm may outperform existing methods, and on more complicated domains it is especially competitive. The core ideas are (1) representation
Yuji Nakatsukasa   +2 more
openaire   +4 more sources

Improved approximation algorithms for optimization problems in graphs with superlogarithmic treewidth

open access: yes, 2003
In this paper we present two novel generic schemes for approximation algorithms for optimization to partial k-trees. Our first scheme yields deterministic polynomialtime algorithms achieving typically an approximation factor of k/ log n, where k
Chlebikova, Janka   +14 more
core   +1 more source

Hardness of submodular cost allocation : lattice matching and a simplex coloring conjecture [PDF]

open access: yes, 2014
We consider the Minimum Submodular Cost Allocation (MSCA) problem. In this problem, we are given k submodular cost functions f1, ... , fk: 2V -> R+ and the goal is to partition V into k sets A1, ..., Ak so as to minimize the total cost sumi = 1,k fi(Ai).
Vondrák, Jan, Ene, Alina
core   +1 more source

A Dynamic Programming Based Improvement Heuristic for a Repetitive Routing Problem of Grasp-and-Delivery Robots

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2012
We consider a repetitive routing problem of a single grasp-and-delivery robot used on a printed circuit board (PCB) assembly line. The robot arranges n identical pins from their current configuration to the next required one by transferring at most one ...
Aleksandar SHURBEVSKI   +2 more
doaj   +1 more source

Approximate Weak Greedy Algorithms [PDF]

open access: yesAdvances in Computational Mathematics, 2001
We present a generalization of V. Temlyakov's weak greedy algorithm, and give a sufficient condition for norm convergence of the algorithm for an arbitrary dictionary in a Hilbert space. We provide two counter-examples to show that the condition cannot be relaxed for general dictionaries.
Rémi Gribonval, Morten Nielsen 0002
openaire   +3 more sources

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