Results 31 to 40 of about 1,255,138 (288)

The Covering Threshold of a Directed Acyclic Graph by Directed Acyclic Subgraphs

open access: yesThe Electronic Journal of Combinatorics, 2022
Let $H$ be a directed acyclic graph (dag) that is not a rooted star. It is known that there are constants $c=c(H)$ and $C=C(H)$ such that the following holds for $D_n$, the complete directed graph on $n$ vertices. There is a set of at most $C\log n$ directed acyclic subgraphs of $D_n$ that covers every $H$-copy of $D_n$, while every set of at most $c ...
openaire   +2 more sources

DAGmaps: Space Filling Visualization of Directed Acyclic Graphs

open access: yesJournal of Graph Algorithms and Applications, 2009
Gene Ontology information related to the biological role of genes is organized in a hierarchical manner that can be represented by a directed acyclic graph (DAG).
Vassilis Tsiaras   +2 more
doaj   +1 more source

Qualitative Approximations to Causality: Non-Randomizable Factors in Clinical Psychology

open access: yesClinical Psychology in Europe, 2021
[Background] Causal quests in non-randomized studies are unavoidable just because research questions are beyond doubt causal (e.g., aetiology). Large progress during the last decades has enriched the methodical toolbox. [Aims] Summary papers mainly focus
Michael Höfler   +2 more
doaj   +1 more source

Generalized Layerings for Arbitrary and Fixed Drawing Areas

open access: yesJournal of Graph Algorithms and Applications, 2017
The Directed Layering Problem (DLP) solves a step of the widely used layer-based approach to automatically draw directed acyclic graphs. To cater for cyclic graphs, usually a preprocessing step is used that solves the Feedback Arc Set Problem (FASP) to ...
Ulf Rüegg   +3 more
doaj   +1 more source

Decision-theoretic foundations for statistical causality: Response to Pearl

open access: yesJournal of Causal Inference, 2022
I thank Judea Pearl for his discussion of my paper and respond to the points he raises. In particular, his attachment to unaugmented directed acyclic graphs has led to a misapprehension of my own proposals. I also discuss the possibilities for developing
Dawid Philip
doaj   +1 more source

On compact directed acyclic word graphs [PDF]

open access: yes, 1997
The Directed Acyclic Word Graph (DAWG) is a space-efficient data structure to treat and analyze repetitions in a text, especially in DNA genomic sequences. Here, we consider the Compact Directed Acyclic Word Graph of a word. We give the first direct algorithm to construct it. It runs in time linear in the length of the string on a fixed alphabet.
Crochemore, Maxime, Vérin, Renaud
openaire   +3 more sources

Directed acyclic graphs: A tool to identify confounders in orthodontic research, Part II [PDF]

open access: yes, 2017
In the previous article, we discussed the problem of confounding and presented 3 fundamental methods for assessing and adjusting for confounders: the traditional approach, the noncollapsibility approach, and the directed acyclic graphs (DAGs) or causal ...
Thikriat S. Al-Jewair   +5 more
core   +2 more sources

MRC Directed Acyclic Graphs for Mendelian Randomisation

open access: yes, 2022
MRC Directed Acyclic Graphs for Mendelian ...
Nay Aung (11874419)
core   +1 more source

DIGRUNDY NUMBER OF DIRECTED STAR, BANANA TREE, FIREWORKS, AND COCONUT TREE GRAPHS

open access: yesBarekeng
A digrundy coloring of a graph is a vertex coloring in which every vertex assigned a higher color is adjacent to vertices assigned all smaller colors. The maximum number of colors that can be realized in such a coloring of an acyclic directed graph is ...
Raventino Raventino, Fransiskus Fran
doaj   +1 more source

Ternary directed acyclic word graphs

open access: yesTheoretical Computer Science, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Satoru Miyamoto   +3 more
openaire   +4 more sources

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