Results 41 to 50 of about 28,286 (155)

Shrub-depth: Capturing Height of Dense Graphs

open access: yes, 2019
The recent increase of interest in the graph invariant called tree-depth and in its applications in algorithms and logic on graphs led to a natural question: is there an analogously useful "depth" notion also for dense graphs (say; one which is stable ...
de Mendez, Patrice Ossona   +4 more
core   +1 more source

Bayesian Learning of Clique Tree Structure

open access: yes, 2017
The problem of categorical data analysis in high dimensions is considered. A discussion of the fundamental difficulties of probability modeling is provided, and a solution to the derivation of high dimensional probability distributions based on Bayesian learning of clique tree decomposition is presented.
Savkli, Cetin   +3 more
openaire   +2 more sources

From tree-decompositions to clique-width terms [PDF]

open access: yesDiscrete Applied Mathematics, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Exploiting Chordality in Optimization Algorithms for Model Predictive Control

open access: yes, 2017
In this chapter we show that chordal structure can be used to devise efficient optimization methods for many common model predictive control problems.
A Alessio   +17 more
core   +1 more source

Embedding a Forest in a Graph [PDF]

open access: yes, 2010
For \math{p\ge 1}, we prove that every forest with \math{p} trees whose sizes are $a_1,..., a_p$ can be embedded in any graph containing at least $\sum_{i=1}^p (a_i + 1)$ vertices and having a minimum degree at least $\sum_{i=1}^p a_i$.Comment: Working ...
Goldberg, Mark, Magdon-Ismail, Malik
core  

Oriented coloring on recursively defined digraphs

open access: yes, 2019
Coloring is one of the most famous problems in graph theory. The coloring problem on undirected graphs has been well studied, whereas there are very few results for coloring problems on directed graphs. An oriented k-coloring of an oriented graph G=(V,A)
Gurski, Frank   +2 more
core   +1 more source

The Algorithmic Complexity of Tree-Clique Width

open access: yes, 2021
Tree-width has been proven to be a useful parameter to design fast and efficient algorithms for intractable problems. However, while tree-width is low on relatively sparse graphs can be arbitrary high on dense graphs. Therefore, we introduce tree-clique width, denoted by $tcl(G)$ for a graph $G$, a new width measure for tree decompositions.
openaire   +2 more sources

Matching free trees, maximal cliques, and monotone game dynamics [PDF]

open access: yesIEEE Transactions on Pattern Analysis and Machine Intelligence, 2001
Motivated by our recent work on rooted tree matching, in this paper we provide a solution to the problem of matching two free (i.e., unrooted) trees by constructing an association graph whose maximal cliques are in one-to-one correspondence with maximal common subtrees.
openaire   +3 more sources

The Ramsey Theory of Henson graphs

open access: yes, 2020
Analogues of Ramsey's Theorem for infinite structures such as the rationals or the Rado graph have been known for some time. In this context, one looks for optimal bounds, called degrees, for the number of colors in an isomorphic substructure rather than
Dobrinen, Natasha
core  

Ordered increasing k-trees: Introduction and analysis of a preferential attachment network model

open access: yes, 2010
We introduce a random graph model based on k-trees, which can be generated by applying a probabilistic preferential attachment rule, but which also has a simple combinatorial description.
Panholzer, Alois, Seitz, Georg
core   +2 more sources

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