8 citations · 21 across the 11 of their papers we have counts for
11 papers
Graph Distances and Clustering
Pierre Miasnikof, Alexander Y. Shestopaloff, Leonidas Pitsoulis +1
With a view on graph clustering, we present a definition of vertex-to-vertex distance which is based on shared connectivity. We argue that vertices sharing more connections are clo…
Overlapping community detection in networks based on link partitioning and partitioning around medoids
Alexander Ponomarenko, Leonidas Pitsoulis, Marat Shamshetdinov
In this paper, we present a new method for detecting overlapping communities in networks with a predefined number of clusters called LPAM (Link Partitioning Around Medoids). The ov…
Optimization techniques for multivariate least trimmed absolute deviation estimation
G. Zioutas, C. Chatzinakos, T. D. Nguyen +1
Given a dataset an outlier can be defined as an observation that it is unlikely to follow the statistical properties of the majority of the data. Computation of the location estima…
Decomposition of Quaternary Signed-Graphic Matroids
Leonidas Pitsoulis, Eleni-Maria Vretta
In this work we provide a decomposition theorem for the class of quaternary and non-binary signed-graphic matroids. This generalizes previous results for binary signed-graphic matr…
Binary Matroids with Graphic Cocircuits
Konstantinos Papalamprou, Leonidas Pitsoulis
An excluded minor characterization for the class of binary signed-graphic matroids with graphic cocircuits is provided. In this report we present the necessary computations for the…
-Sum Decomposition of Strongly Unimodular Matrices
Konstantinos Papalamprou, Leonidas Pitsoulis
Networks are frequently studied algebraically through matrices. In this work, we show that networks may be studied in a more abstract level using results from the theory of matroid…