Game Theory, Probability Theory

Books

1. 1. V. Petridis and Ath. Kehagias. Predictive Modular Neural Networks for Time Series Classification, Prediction and Identification. Kluwer Academic Publishers, 1998.
   2. Ath. Kehagias. “A Family of Multi-valued t-norms and t-conorms”. In Computational Intelligence Based on Lattice Theory, eds. V.G. Kaburlasos and G.X. Ritter, Springer, 2007.
   3. Ath. Kehagias. “The Construction of Fuzzy-valued t-norms and t-conorms”. In Computational Intelligence Based on Lattice Theory, eds. V.G. Kaburlasos and G.X. Ritter, Springer, 2007
   4. Ath. Kehagias and M. Koutsmanis, Graph Pursuit Games and New Algorithms for Nash Equilibrium Computation , 2022
   5. Ath. Kehagias. “Payoff Independent Action Update for Continuous Action Social Dilemmas: a Preliminary Investigation , 2022
   6. S. Mastrakoulis and Ath. Kehagias, Static Nuel Games with Terminal Payoff, 2023

Papers

1. 1. Ath. Kehagias. “Optimal Control for Training: the Missing Link between Hidden Markov Models and Connectionist Networks”. Mathematical and Computer Modelling, Vol. 14, pp.284-289, 1990.
   2. Ath. Kehagias. “Convergence Properties of the Lainiotis Partition Algorithm”. Control and Computers, Vol. 19, pp. 1-6, 1991.
   3. H. Kuensch, S. Geman, Ath. Kehagias. “Hidden Markov Random Fields.” Annals of Applied Probability, Vol.5, pp.577-602, 1995.
   4. G. Bertocchi and Ath. Kehagias. “Efficiency and Optimality in Stochastic Models with Production”. Journal of Economic Dynamics and Control, Vol.19, pp.303-325, 1995.
   5. V. Petridis and Ath. Kehagias. “Modular Neural Networks for MAP Classification of Time Series and the Partition Algorithm”. IEEE Trans. on Neural Networks, Vol.7, pp.73-86, 1996.
   6. V. Petridis and Ath. Kehagias. “A Recurrent Network Implementation of Bayesian Time Series Classification”. Neural Computation, vol.8, pp.357-372, 1996.
   7. Ath. Kehagias. “Bayesian Classification of Hidden Markov Models”. Mathematical and Computer Modelling, Vol.23, pp.25-43, 1996.
   8. V. Petridis and Ath. Kehagias. “Predictive Modular Fuzzy Systems for Time Series Classification”. IEEE Trans. on Fuzzy Systems, Vol.5, pp.381-397, 1997.
   9. Ath. Kehagias and V. Petridis. “Time Series Segmentation using Predictive Modular Neural Networks”. Neural Computation, Vol.9, pp.1691-1710, 1997.
   10. A. Bakirtzis, S. Kiartzis, V. Petridis and Ath. Kehagias. “Short Term Load Forecasting using a Bayesian Combination Method “. Int. Journal of Electrical Power and Energy Systems, Vol. 19, pp.171-177, 1997.
   11. Ath. Kehagias and V. Petridis. “Predictive Modular Neural Networks for Time Series Classification “. Neural Networks, Vol.10, pp.31-49, 1997.
   12. V. Petridis and Ath. Kehagias. “A Multi-Model Algorithm for Parameter Estimation of Time Varying Nonlinear Systems”. Automatica, Vol.34, pp.469-475, 1998.
   13. V. Petridis, M. Paterakis and Ath. Kehagias. “A Hybrid Neural-Genetic Multi-Model Parameter Estimation Algorithm”. IEEE Transactions in Neural Networks, Vol.9, pp.862-876, 1998. `
   14. P.Vlachos and A. Kehagias. “A Computer Algebra System and a New Approach for Teaching Business Calculus”. Int. Journal of Computer Algebra in Mathematics Education, vol.7, pp.87-104, 2000.
   15. G. Antoniou and Ath. Kehagias. “On the Refinement of Ontologies”. Int. Journal of Intelligent Systems, vol. 15, pp.623-632, 2000.
   16. A. Konstantinidis, T. Ioannidou, Ath. Kehagias and E.C. Aifantis. “Gradient Constitutive Equations, Size Effects and Artificial Neural Networks”. Journal of the Mechanical Behavior of Materials, vol.12, pp.141-157, 2001.
   17. V. Petridis, Ath. Kehagias, L. Petrou, A. Bakirtzis, N. Maslaris, S. Kiartzis and H. Panagiotou. “A Bayesian Multiple Models Combination Method for Time Series Prediction”. Journal of Intelligent and Robotic Systems, vol. 31, pp.69-89, 2001.
   18. K. Baganas, Ath. Kehagias and A. Charalambopoulos. “Inhomogenous Dielectric Media: Wave Propagation and Dielectric Permittivity Reconstruction”. Journal of Electromagnetic Waves and Applications, vol. 15, pp. 1373–1400, 2001.
   19. Ath. Kehagias, K. Serafimidis and M. Konstantinidou. “A Note on the Congruences of the Nakano Superlattice and Some Properties of the Associated Quotients”. Rendiconti del Circolo Matematico del Palermo, vol.51, pp.333-354, 2002.
   20. Ath. Kehagias, “An example of L-fuzzy Join Space”. Rendiconti del Circolo Matematico del Palermo, vol.51, pp.503-526, 2002.
   21. Ath. Kehagias and V. Petridis. “Predictive Modular Neural Networks for Unsupervised Segmentation of Switching Time Series: the Data Allocation Problem”. IEEE Trans. on Neural Networks, vol.13, pp.1432-1449, 2002.
   22. A. Economides and Ath. Kehagias. “The STAR Automaton: Expediency and Optimality Properties”. IEEE Trans. on Systems, Man and Cybernetics, vol.32, pp.723-737, 2002.
   23. K. Serafimidis, Ath. Kehagias and M. Konstantinidou. “The L-Fuzzy Corsini Join Hyperoperation” . Italian Journal of Pure and Applied Mathematics, vol.12, pp.83-90, 2002.
   24. Ath. Kehagias and M. Konstantinidou. “L-Fuzzy Valued Inclusion Measure, L-Fuzzy Similarity and L-Fuzzy Distance”. Fuzzy Sets and Systems, vol.136, pp.313-332, 2003.
   25. Ath. Kehagias, V. Petridis, V.G. Kaburlasos, and P. Fragkou. “A Comparison of Word- and Sense-based Text Categorization Using Several Classification Algorithms”. J. of Int. Inf. Sys., vol.21, pp.227-247, 2003.
   26. Ath. Kehagias. “L-fuzzy Join and Meet Hyperoperations and the Associated L-fuzzy Hyperalgebras” . Rendiconti del Circolo Matematico di Palermo, vol.52, pp.322-350, 2003.
   27. Ath. Kehagias. “A Hidden Markov Model Segmentation Procedure for Hydrological and Enviromental Time Series”. Stoch. Env. Res. Risk Anal., vol.18, pp.117-130, 2004.
   28. Ath. Kehagias, A. Nicolaou, P. Fragkou and V. Petridis. “Text Segmentation by Product Partition Models and Dynamic Programming”. Mathematical and Computer Modelling, vol.39, pp.209-217, 2004.
   29. K. Serafimidis, Ath. Kehagias and M. Konstantinidou. “The Structure of the (P,Q)-Superlattice and Order Related Properties”. Italian Journal of Pure and Applied Mathematics, vol.15, pp.133-150, 2004.
   30. K. Serafimidis and Ath. Kehagias. “Some Representation Results for (P,Q)-Superlattices”. Italian Journal of Pure and Applied Mathematics, vol.15, pp.151-164, 2004.
   31. Ath. Kehagias, P. Fragkou and V. Petridis. “A Dynamic Programming Algorithm for Linear Text Segmentation”. Journal of Int. Information Systems, vol. 23, pp.179-197, 2004
   32. D. Kugiumtzis, Ath. Kehagias, E.C. Aifantis and H. Neuhauser. “Statistical Analysis of the Extreme Values of Stress Time Series from PLC Effect”. . Physical Review E, Vol 70, No 3, 036110, 2004.
   33. Ath. Kehagias and K. Serafimidis. “The L-Fuzzy Nakano Hypergroup”. Information Sciences, vol. 169, pp.305-327, 2005
   34. K. Serafimidis and Ath. Kehagias. “Some Remarks on Congruences obtained from the L-Fuzzy Nakano Hyperoperation”. Information Sciences, Volume 176, Issue 3 , Pages 301-320, 2006..
   35. V.G.Kaburlasos and Ath. Kehagias. “Novel fuzzy inference system (FIS) analysis and design based on lattice theory. Part I: Working principles”. International Journal of General Systems, Volume 35, Pages 45-67, 2006.
   36. Ath. Kehagias and V. Fortin.“Time series segmentation with shifting means hidden Markov models”. Nonlinear Processes in Geophysics, Volume 13, Pages 339-352, 2006.
   37. Ath. Kehagias, Ev. Nidelkou and V. Petridis. “A dynamic programming segmentation procedure for hydrological and environmental time series”. Journal Stochastic Environmental Research and Risk Assessment (SERRA), Volume 20, Pages 77-94, 2006.
   38. Ath. Kehagias and K. Vezerides. “Computation of Fuzzy Truth Values for the Liar and Related Self-Referential Systems”. J. of Mult.Valued Logic and Soft Computing, vol.12, pp.539-559, 2006.
   39. V.G.Kaburlasos and Ath. Kehagias. “Novel Fuzzy Inference System (FIS) Analysis and Design Based on Lattice Theory”. IEEE Trans. on Fuzzy Systems, vol. 15, pp. 243-260, 2007.
   40. H. Aksoy, A. Gedikli, N. Erdem Unal, Ath. Kehagias. “Fast segmentation algorithms for long hydrometeorological time series”. Hydrological Processes, vol. 22, pp. 4600 – 4608, 2008.
   41. G. Hollinger, S. Singh, J. Djugash, and Ath. Kehagias. “Efficient Multi-Robot Search for a Moving Target”. The International Journal of Robotics Research, vol. 28, pp. 201-219, 2009.
   42. Ath. Kehagias, G. Hollinger and S. Singh. “A graph search algorithm for indoor pursuit/evasion”. Mathematical and Computer Modelling, vol. 50, pp. 1305-1317, 2009.
   43. H. Aksoy, A. Gedikli, N. Erdem Unal, Ath. Kehagias. “Modified dynamic programming approach for offline segmentation of long hydrometeorological time series”. Stochastic Environmental Research and Risk Assessment, Vol.24, pp. 547-557 (2010).
   44. G. Hollinger, Ath. Kehagias and S. Singh. “GSST: Anytime guaranteed search”. . Autonomous Robots”, vol. 29, pp. 99-118 (2010).
   45. G. Hollinger, Ath. Kehagias and S. Singh. “Improving the efficiency of clearing with multi-agent teams”. Int. J. of Robotic Research, vol. 29, pp. 1088-1105 (2010).
   46. Ath. Kehagias. “Some remarks on the lattice of fuzzy intervals”. Information Sciences, Vol. 181, pp.1863-1873 (2011).
   47. Ath. Kehagias and P. Prałat. “Some remarks on cops and drunk robbers.” Theoretical Computer Science (2012).
   48. Ath. Kehagias, D. Mitsche and P. Prałat. “Cops and invisible Robbers: The cost of drunkenness.” Theoretical Computer Science (2013).
   49. Ath. Kehagias and G. Kartsiotis. “On the Use of Fuzzy Logic and Learning Automata Optimization to Resolve the Liar and Related Paradoxes.” Journal of Intelligent and Fuzzy Systems (2013).
   50. Ath. Kehagias and L. Pitsoulis, ” Bad Communities with High Modularity“, The European Physics Journal B, vol.86, pp.1-11 (2013).
   51. V.G.Kaburlasos and Ath. Kehagias, Fuzzy inference system (FIS) extensions based on lattice theory“, IEEE Transactions on Fuzzy Systems, vol.22, pp.531-543 (2014).
   52. Ath. Kehagias, D. Mitsche and P. Prałat, ” The role of visibility in pursuit/evasion games“, Robotics, vol.3, pp.371-399 (2014).
   53. G. Konstantinidis and Ath. Kehagias, ” Simultaneously Moving Cops and Robbers“, Theoretical Computer Science vol. 645, pp.48-59 (2016).
   54. Ath. Kehagias and G. Konstantinidis, ” Selfish cops and passive robber: Qualitative games“, Theoretical Computer Science, Vol. 680, pp. 25-35 (2017).
   55. Ath. Kehagias, ” Generalized Cops and Robbers: A Multi-player Pursuit Game on Graphs“, Dynamic Games and Applications, Vol.9, pp.1076-1099 (10.1007/s13235-018-0288-0) (2019).
   56. Ath. Kehagias and G. Konstantinidis, ” Selfish cops and active robber: Multi-player pursuit evasion on graphs“, Theoretical Computer Science, Vol. 780, pp.84-102, (2019).
   57. Chariton Karamitas and Athanasios Kehagias, ” Function matching between binary executables: efficient algorithms and features“, Journal of Computer Virology and Hacking Techniques Vol.15, pp.307-323, (10.1007/s11416-019-00339-6) (2019).
   58. Anastasios Tzitzis, Spyros Megalou, Stavroula Siachalou, Emmanouil Tsardoulias, Athanasios Kehagias, Traianos Yioultsis, Antonis G Dimitriou, ” Localization of RFID Tags by a Moving Robot, via Phase Unwrapping and Non-Linear Optimization“, IEEE Journal of Radio Frequency Identification Vol.3, pp.216-226, (10.1109/JRFID.2019.2936969) (2019).
   59. G. Konstantinidis, Ath. Kehagias, “On positionality of trigger strategies Nash equilibria in SCAR“, Theoretical Computer Science, vol.845, pp.144-158 (2020).
   60. Ath. Kehagias, G. Konstantinidis, “Some Game-Theoretic Remarks on Two-Player Generalized Cops and Robbers Games“, Dynamic Games and Applications, Issue 4 (2021).
   61. Ath. Kehagias, “A note on the Nash equilibria of some multi-player reachability/safety games“, Journal of Dynamics and Games , Vol. 9, pp.117-122 (2022).
   62. S. Batsakis et al. “Data-Driven Decision Support for Adult Autism Diagnosis, Digital, vol.2, pp. 224-243 (2022).
   63. C. Karamitas and Ath. Kehagias, “Improving Binary Diffing Speed and Accuracy Using Community Detection and Locality-sensitive Hashing: an Empirical Study, Journal of Computer Virology and Hacking Techniques, Vol. 19, pp.319-337, (2023)
   64. Ath. Kehagias, “The Duel Discounted Stochastic Game“,  Dynamic Games and Applications, pp.1-19, (2023).
   65. Ath. Kehagias, “On the Nash Equilibria of a Duel with Terminal Payoffs” , Games, Vol. 14, pp.62-72, (2023).

Athanasios Kehagias

Associate Professor of Applied Mathematics

Dep. of Electrical and Computer Engineering

Aristotle University of Thessaloniki

Thessaloniki GR54124, GREECE

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Phone +30-2310-995944, Fax +30-2310-996132
Email: kehagiat@auth.gr , kehagiat@gmail.com

Web Page: http://users.auth.gr/~kehagiat

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Studies

1979-1984	Aristotle University of Thessaloniki, Diploma in Electrical Engineering.
1984-1986	Lehigh University (Pennsylvania, USA), M.Sc. in Applied Mathematics.
1986-1991	Brown University (Rhode Island, USA), Ph.D. in Applied Mathematics.

Escher Metamorphosis

MacTutor

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Algebraic Surfaces Gallery

For the Love of Math (Scanned Greek Math Books)

Math Studio

Opinions of Dr. Z

EqWorld

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Biographies

Mark Newbold

Ishihama Yoshiaki

The Geometry JunkYard

 

Project Euler

Math Recreations

Mathematical Puzzles

rec.puzzles

Puzzle Archive

Stack Exchange Puzzles

Cut the Knot

Texts

Salonica, Lost City

Μνημοσυνη, Greek Texts

Aesop’s Fables

Sacred Texts

Dimitris Lithoksoou

Shtetl-Optimized

UbuWeb

Achilles’ Shield

Funeral Oration (Ilias Petropoulos)

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This is the Title of This Story

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Take Five Sitar

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William Tell Overture

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