599 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National and Kapodistrian University of AthensGR24 papers
- National Technical University of AthensGR11 papers
- Athena Research and Innovation Center In Information Communication & Knowledge TechnologiesGR9 papers
- Athens State UniversityUS7 papers
- Centre National de la Recherche ScientifiqueFR7 papers
- Centrum Wiskunde & InformaticaNL7 papers
- Delft University of TechnologyNL7 papers
- École PolytechniqueFR7 papers
- University College LondonGB7 papers
- University of OxfordGB7 papers
- Laboratoire d'Informatique de l'École PolytechniqueFR6 papers
- University of AmsterdamNL6 papers
12 papers · 1 filter
On the -Norm Ergodicity of Markov Processes in Continuous Time
I. Kontoyiannis, S. P. Meyn
Consider a Markov process evolving on a Polish space . A version of the -Norm Ergodic Theorem is obtained: Suppose that the process is -irreduci…
CVC: The Contourlet Video Compression algorithm for real-time applications
Stamos Katsigiannis, Georgios Papaioannou, Dimitris Maroulis
Nowadays, real-time video communication over the internet through video conferencing applications has become an invaluable tool in everyone's professional and personal life. This t…
Scalable inference for a full multivariate stochastic volatility model
P. Dellaportas, A. Plataniotis, M. K. Titsias
We introduce a multivariate stochastic volatility model for asset returns that imposes no restrictions to the structure of the volatility matrix and treats all its elements as func…
Graphic Realizations of Joint-Degree Matrices
Georgios Amanatidis, Bradley Green, Milena Mihail
In this paper we introduce extensions and modifications of the classical degree sequence graphic realization problem studied by Erdős-Gallai and Havel-Hakimi, as well as of the cor…
Entropy bounds on abelian groups and the Ruzsa divergence
Mokshay Madiman, Ioannis Kontoyiannis
Over the past few years, a family of interesting new inequalities for the entropies of sums and differences of random variables has been developed by Ruzsa, Tao and others, motivat…
The X-ray luminosity function of Active Galactic Nuclei in the redshift interval z=3-5
A. Georgakakis, J. Aird, J. Buchner +13
We combine deep X-ray survey data from the Chandra observatory and the wide-area/shallow XMM-XXL field to estimate the AGN X-ray luminosity function in the redshift range z=3-5. Th…
Inference for determinantal point processes without spectral knowledge
Rémi Bardenet, Michalis K. Titsias
Determinantal point processes (DPPs) are point process models that naturally encode diversity between the points of a given realization, through a positive definite kernel . DPP…
Invariant current approach to wave propagation in locally symmetric structures
V. E. Zambetakis, M. K. Diakonou, C. V. Morfonios +3
A theory for wave mechanical systems with local inversion and translation symmetries is developed employing the two-dimensional solution space of the stationary Schrödinger equatio…
Pareto Optimal Matchings in Many-to-Many Markets with Ties
Katarína Cechlárová, Pavlos Eirinakis, Tamás Fleiner +5
We consider Pareto-optimal matchings (POMs) in a many-to-many market of applicants and courses where applicants have preferences, which may include ties, over individual courses an…
The Hamming Ball Sampler
Michalis K. Titsias, Christopher Yau
We introduce the Hamming Ball Sampler, a novel Markov Chain Monte Carlo algorithm, for efficient inference in statistical models involving high-dimensional discrete state spaces. T…
LSHTC: A Benchmark for Large-Scale Text Classification
Ioannis Partalas, Aris Kosmopoulos, Nicolas Baskiotis +6
LSHTC is a series of challenges which aims to assess the performance of classification systems in large-scale classification in a a large number of classes (up to hundreds of thous…
Approximation Algorithms for Computing Maximin Share Allocations
Georgios Amanatidis, Evangelos Markakis, Afshin Nikzad +1
We study the problem of computing maximin share guarantees, a recently introduced fairness notion. Given a set of agents and a set of goods, the maximin share of a single agent…