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In this paper we explain how to easily compute gene clusters, formalized by classical or generalized nested common or conserved intervals, between a set of K genomes represented as K permutations. A b-nested common (resp. conserved)…

数据结构与算法 · 计算机科学 2013-12-03 Fabien de Montgolfier , Mathieu Raffinot , Irena Rusu

Common intervals have been defined as a modelisation of gene clusters in genomes represented either as permutations or as sequences. Whereas optimal algorithms for finding common intervals in permutations exist even for an arbitrary number…

数据结构与算法 · 计算机科学 2013-10-17 Irena Rusu

In 1969, Roberts introduced proper and unit interval graphs and proved that these classes are equal. Natural generalizations of unit interval graphs called $k$-length interval graphs were considered in which the number of different lengths…

离散数学 · 计算机科学 2017-04-13 Pavel Klavík , Yota Otachi , Jiří Šejnoha

Given an elementary chain of vertex set V, seen as a labelling of V by the set {1, ...,n=|V|}, and another discrete structure over $V$, say a graph G, the problem of common intervals is to compute the induced subgraphs G[I], such that $I$…

数据结构与算法 · 计算机科学 2013-09-30 Ismael Belghiti , Michel Habib

This paper deals with the problem of finding, for a given graph and a given natural number k, a subgraph of k nodes with a maximum number of edges. This problem is known as the k-cluster problem and it is NP-hard on general graphs as well…

数据结构与算法 · 计算机科学 2011-11-09 George B. Mertzios

In the Interval Completion problem we are given a graph G and an integer k, and the task is to turn G using at most k edge additions into an interval graph, i.e., a graph admitting an intersection model of intervals on a line. Motivated by…

数据结构与算法 · 计算机科学 2014-11-11 Ivan Bliznets , Fedor V. Fomin , Marcin Pilipczuk , Michał Pilipczuk

In the Proper Interval Completion problem we are given a graph G and an integer k, and the task is to turn G using at most k edge additions into a proper interval graph, i.e., a graph admitting an intersection model of equal-length…

数据结构与算法 · 计算机科学 2014-02-17 Ivan Bliznets , Fedor V. Fomin , Marcin Pilipczuk , Michał Pilipczuk

Indexing intervals is a fundamental problem, finding a wide range of applications. Recent work on managing large collections of intervals in main memory focused on overlap joins and temporal aggregation problems. In this paper, we propose…

数据库 · 计算机科学 2022-03-08 George Christodoulou , Panagiotis Bouros , Nikos Mamoulis

In ongoing work to define a principled method for syntenic block discovery and structuring, work based on homology-derived constraints and a generalization of common intervals, we faced a fundamental computational problem: how to determine…

数据结构与算法 · 计算机科学 2023-04-07 Daniel Doerr , Bernard M. E. Moret

In the classical interval scheduling type of problems, a set of $n$ jobs, characterized by their start and end time, need to be executed by a set of machines, under various constraints. In this paper we study a new variant in which the jobs…

数据结构与算法 · 计算机科学 2015-11-02 Veli Mäkinen , Valeria Staneva , Alexandru Tomescu , Daniel Valenzuela

The NP-complete Permutation Pattern Matching problem asks whether a $k$-permutation $P$ is contained in a $n$-permutation $T$ as a pattern. This is the case if there exists an order-preserving embedding of $P$ into $T$. In this paper, we…

数据结构与算法 · 计算机科学 2015-03-17 Marie-Louise Bruner , Martin Lackner

Using recurrences gotten from the Apagodu-Zeilberger Multivariate Almkvist-Zeilberger algorithm we present a linear-time, and constant-space, algorithm to compute the general mixed moments of the k-variate general normal distribution, with…

组合数学 · 数学 2022-02-22 Shalosh B. Ekhad , Doron Zeilberger

Permutation patterns and pattern avoidance have been intensively studied in combinatorics and computer science, going back at least to the seminal work of Knuth on stack-sorting (1968). Perhaps the most natural algorithmic question in this…

数据结构与算法 · 计算机科学 2019-08-14 Benjamin Aram Berendsohn , László Kozma , Dániel Marx

We study a generalization of the recently introduced order-preserving pattern matching, where instead of looking for an exact copy of the pattern, we only require that the relative order between the elements is the same. In our variant, we…

数据结构与算法 · 计算机科学 2014-03-07 Pawel Gawrychowski , Przemyslaw Uznanski

Permutation patterns and pattern avoidance have been intensively studied in combinatorics and computer science, going back at least to the seminal work of Knuth on stack-sorting (1968). Perhaps the most natural algorithmic question in this…

数据结构与算法 · 计算机科学 2019-04-17 László Kozma

The classical persistence algorithm computes the unique decomposition of a persistence module implicitly given by an input simplicial filtration. Based on matrix reduction, this algorithm is a cornerstone of the emergent area of topological…

代数拓扑 · 数学 2021-12-07 Tamal K. Dey , Cheng Xin

In this paper, a novel feature selection approach for supervised interval valued features is proposed. The proposed approach takes care of selecting the class specific features through interval K-Means clustering. The kernel of K-Means…

计算机视觉与模式识别 · 计算机科学 2017-06-01 D. S. Guru , N. Vinay Kumar

Learning linear combinations of multiple kernels is an appealing strategy when the right choice of features is unknown. Previous approaches to multiple kernel learning (MKL) promote sparse kernel combinations to support interpretability and…

机器学习 · 计算机科学 2010-10-28 Marius Kloft , Ulf Brefeld , Soeren Sonnenburg , Alexander Zien

Interval and proper interval graphs are very well-known graph classes, for which there is a wide literature. As a consequence, some generalizations of interval graphs have been proposed, in which graphs in general are expressed in terms of…

离散数学 · 计算机科学 2023-04-04 Flavia Bonomo-Braberman , Fabiano S. Oliveira , Moysés S. Sampaio , Jayme L. Szwarcfiter

We present a new algorithm for solving a polynomial program P based on the recent "joint + marginal" approach of the first author for, parametric optimization. The idea is to first consider the variable x1 as a parameter and solve the…

最优化与控制 · 数学 2010-06-01 Jean B. Lasserre , Thanh Tung Phan
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