Vertex-Pursuit in Random Directed Acyclic Graphs

نویسندگان

  • Anthony Bonato
  • Dieter Mitsche
  • Pawel Pralat
چکیده

We examine a dynamic model for the disruption of information flow in hierarchical social networks by considering the vertex-pursuit game Seepage played in directed acyclic graphs (DAGs). In Seepage, agents attempt to block the movement of an intruder who moves downward from the source node to a sink. We propose a generalized stochastic model for DAGs with given expected total degree sequence. Seepage is analyzed rigorously in stochastic DAGs in both the cases of a regular and power law degree sequence.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Parameterized algorithms for feedback set problems and their duals in tournaments

The parameterized feedback vertex (arc) set problem is to find whether there are k vertices (arcs) in a given graph whose removal makes the graph acyclic. The parameterized complexity of this problem in general directed graphs is a long standing open problem. We investigate the problems on tournaments, a well studied class of directed graphs. We consider both weighted and unweighted versions. W...

متن کامل

Partitions and orientations of the Rado graph

We classify the countably infinite oriented graphs which, for every partition of their vertex set into two parts, induce an isomorphic copy of themselves on at least one of the parts. These graphs are the edgeless graph, the random tournament, the transitive tournaments of order type ωα, and two orientations of the Rado graph: the random oriented graph, and a newly found random acyclic oriented...

متن کامل

Vertex-Pursuit in Hierarchical Social Networks

Hierarchical social networks appear in a variety of contexts, such as the on-line social network Twitter, the social organization of companies, and terrorist networks. We examine a dynamic model for the disruption of information flow in hierarchical social networks by considering the vertex-pursuit game Seepage played in directed acyclic graphs (DAGs). In Seepage, agents attempt to block the mo...

متن کامل

Creating Minimal Vertex Series Parallel Graphs from Directed Acyclic Graphs

Visualizing information whose underlying graph is directed acyclic is easier if the graph is Minimal Vertex Series Parallel (MVSP). We present method of transforming any directed acyclic graph into one that is MVSP. This enables an easy visualization of the information contained in the original graph. We illustrate this by an example of a schedule that contains parallelism.

متن کامل

Regular graphs whose subgraphs tend to be acyclic

Motivated by a problem that arises in the study of mirrored storage systems, we describe, for any fixed , δ > 0 and any integer d ≥ 2, explicit or randomized constructions of d-regular graphs on n > n0( , δ) vertices in which a random subgraph obtained by retaining each edge, randomly and independently, with probability ρ = 1− d−1 , is acyclic with probability at least 1 − δ. On the other hand ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • SIAM J. Discrete Math.

دوره 27  شماره 

صفحات  -

تاریخ انتشار 2013