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Highly Cited

2011

Highly Cited

2011

The power graph of a group is the graph whose vertex set is the group, two elements being adjacent if one is a power of the other… Expand

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Highly Cited

2009

Highly Cited

2009

In this work, we consider the controlled agreement problem for multi-agent networks, where a collection of agents take on leader… Expand

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Highly Cited

2008

Highly Cited

2008

A discrete uncoupling process for finite spaces is introduced, called the Markov Cluster Process or the MCL process. The process… Expand

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Highly Cited

2004

Highly Cited

2004

We study topological properties of conjugacy classes in Polish groups, with emphasis on automorphism groups
of homogeneous… Expand

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Highly Cited

1999

Highly Cited

1999

Abstract. Let G be a closed group of automorphisms of a graph X. We relate geometric properties of G and X, such as amenability… Expand

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Highly Cited

1996

Highly Cited

1996

A labeling of the vertices of a graph G, ` : V (G) !f1;:::;rg, is said to be r-distinguishing provided no automorphism of the… Expand

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Highly Cited

1981

Highly Cited

1981

While it is easy to characterize the graphs on which a given transitive permutation groupG acts, it is very difficult to… Expand

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Highly Cited

1979

Highly Cited

1979

It is proved that the Shannon zero-error capacity of the pentagon is \sqrt{5} . The method is then generalized to obtain upper… Expand

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Highly Cited

1979

Highly Cited

1979

By a result of L. Lovasz, the determination of the spectrum of any graph with transitive automorphism group easily reduces to… Expand

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Highly Cited

1971

Highly Cited

1971

Topological entropy há(T) is defined for a uniformly continuous map on a metric space. General statements are proved about this… Expand

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