**Journal Papers:**

[5] Andreas A. Malikopoulos, Charalambos D. Charalambous and Ioannis Tzortzis. ”The average cost of Markov chains subject to total variation distance uncertainty”, Systems and Control Letters, to appear.

Abstract

[4] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Information transfer of control strategies: Dualities of stochastic optimal control theory and feedback capacity of information theory”, IEEE Transactions on Automatic Control, Volume 62 (10), pp.5010-5025, October 2017.

Abstract

[3] Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous, Christoforos N. Hadjicostis and Mikael Johansson. ”Approximation of Markov processes by lower dimensional processes via total variation metrics”, IEEE Transactions of Automatic Control, Volume 62 (3), pp.1030-1045, March 2017.

Abstract

[2] Ioannis Tzortzis, Charalambos D. Charalambous and Themistoklis Charalambous. “Dynamic programming subject to total variation distance ambiguity”, SIAM Journal on Control and Optimization, Volume 53 (4), pp.2040-2075, July 2015.

Abstract

[1] Charalambos D. Charalambous, Ioannis Tzortzis, Sergey Loyka and Themistoklis Charalambous. “Extremum problems with total variation distance and their applications”, IEEE Transactions of Automatic Control, Volume 59 (9), pp.2353-2368, September 2014.

Abstract

**Journal Papers Submitted:**

[3] Christos K. Kourtellaris, Charalambos D. Charalambous and Ioannis Tzortzis. “Single letter expression of capacity for a class of channels with memory”, IEEE Transactions on Information Theory.

Abstract

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[2] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Information structures of maximizing distributions of feedback capacity for general channels with memory and applications”, IEEE Transactions on Information Theory.

Abstract

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[1] Ioannis Tzortzis, Charalambos D. Charalambous and Themistoklis Charalambous. ”Infinite horizon average cost dynamic programming subject to total variation distance ambiguity”, SIAM Journal on Control and Optimization.

Abstract

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**Conference Papers:**

[19] Charalambos D. Charalambous, Photios A. Stavrou, Christos K. Kourtellaris and Ioannis Tzortzis. “Directed information subject to a fidelity: applications to conditionally Gaussian processes”, In The 2018 European Control Conference (ECC), Limassol, Cyprus, 12-15 June 2018 (to appear).

Abstract

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[18] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Signalling of information in networked stochastic dynamical control systems”, In The 56th IEEE Conference on Decision and Control (CDC), Melbourne, Australia, 12-15 December 2017, pp.3138-3143.

Abstract

[17] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Hierarchical optimality of linear controllers-encoders-decoders operating at control-coding Capacity of LQG control systems”, In The 56th IEEE Conference on Decision and Control (CDC), Melbourne, Australia, 12-15 December 2017, pp.3682-3687.

Abstract

[16] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Hierarchical decomposition of optimal control and information strategies in control-coding capacity of stochastic systems”, In The 56th IEEE Conference on Decision and Control (CDC), Melbourne, Australia, 12-15 December 2017, pp.21-26.

Abstract

[15] Christos K. Kourtellaris, Ioannis Tzortzis and Charalambos D. Charalambous. “Two-letter capacity formula for channels with memory and feedback”, In The 2017 IEEE Information Theory Workshop (ITW), Kaohsiung, Taiwan, 6-10 November 2017 (to appear).

Abstract

| Full Text | External Link

[14] Ioannis Tzortzis, Christoforos N. Hadjicostis and Laurent Mombaerts. “Reconstruction of gene regulatory networks using an error filtering learning scheme”, at the 55th Annual Allerton Conference on Communication, Control, and Computing, Allerton Park and Retreat Center, Monticello, IL, USA, October 3-6, 2017, pp.244-251.

Abstract

[13] Charalambos D. Charalambous, Christos K. Kourtellaris, Sergey Loyka and Ioannis Tzortzis. “The capacity of unstable dynamical systems-interaction of control and information transmission”, At the 2017 IEEE International Symposium on Information Theory (ISIT), Aachen, Germany, 25-30 June 2017, pp.2663-2667.

Abstract

[12] Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous, Christos K. Kourtellaris and Christoforos N. Hadjicostis. “Robust linear quadratic regulator for uncertain systems”, In The 55th IEEE Conference on Decision and Control (CDC), Las Vegas, USA, 12-14 December 2016, pp. 1515-1520.

Abstract

[11] Charalambos D. Charalambous, Christos K. Kourtellaris and Ioannis Tzortzis. “Information transfer in stochastic optimal control with randomized strategies and directed information criterion”, In The 55th IEEE Conference on Decision and Control (CDC), Las Vegas, USA, 12-14 December 2016, pp. 2004-2009.

Abstract

[10] Ioannis Tzortzis, Charalambos D. Charalambous and Themistoklis Charalambous. “Infinite horizon discounted dynamic programming subject to total variation ambiguity on conditional distribution”, In The 55th IEEE Conference on Decision and Control (CDC), Las Vegas, USA, 12-14 December 2016, pp. 2010-2015.

Abstract

[9] Ioannis Tzortzis, Charalambos D. Charalambous and Themistoklis Charalambous. “Infinite horizon average cost dynamic programming subject to ambiguity on conditional distribution”, In The 54th IEEE Conference on Decision and Control (CDC), Osaka, Japan, 15-18 December 2015, pp. 7171-7176.

Abstract

[8] Ioannis Tzortzis, Charalambos D. Charalambous, Themistoklis Charalambous, Christoforos N. Hadjicostis and Mikael Johansson. “Approximation of Markov processes by lower dimensional processes”, In The 53rd IEEE Conference on Decision and Control (CDC), Los Angeles, California, 15-17 December 2014, pp. 4441-4446.

Abstract

[7] Charalambos D. Charalambous, Ioannis Tzortzis, Sergey Loyka, and Themistoklis Charalambous. “Extremum problems with total variation distance”, In The 52nd IEEE Conference on Decision and Control (CDC), Florence, Italy, 10-13, December 2013, pp. 1204-1209.

Abstract

[6] Charalambos D. Charalambous, Ioannis Tzortzis and Themistoklis Charalambous. “Dynamic programming with total variational distance uncertainty”, In The 51st IEEE Conference on Decision and Control (CDC), Maui, Hawaii, 10-13 December 2012, pp. 1909-1914.

Abstract

[5] Charalambos D. Charalambous, Ioannis Tzortzis and Farzad Rezaei. “Stochastic optimal control of discrete-time systems subject to conditional distribution uncertainty”, In The 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC), Orlando, Florida, 12-15 December 2011, pp. 6407-6412.

Abstract

[4] Charalambos D. Charalambous, Ioannis Tzortzis and Farzad Rezaei. “Stochastic optimal control subject to ambiguity”, In The 18th International Federation of Automatic Control World Congress (IFAC), Milano, Italy, August 28-September 2, 2011, pp. 4459-4464.

Abstract

[3] Charalambos D. Charalambous, Farzad Rezaei and Ioannis Tzortzis. “Optimal stochastic control of discrete-time systems subject to total variation distance uncertainty”, In The 49th IEEE Conference on Decision and Control (CDC), Atlanta, Georgia, USA, 15-17 December 2010, pp. 1442-1447.

Abstract

[2] Ioannis Tzortzis and Charalambos D. Charalambous. “Optimum immigration policies based on linear quadratic theory”, In The 4th International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol, Cyprus, 3-5 March 2010, pp. 1-5.

Abstract

[1] Ioannis Tzortzis and Charalambos D. Charalambous. “Dynamic demographic models and parameter identification: simulations based on statistical data”, In The 10th European Control Conference (ECC), Budapest, Hungary, 23-26 August 2009.

Abstract

**Theses Publications:**

[4] Ioannis Tzortzis. “Extremum problems with total variation distance metric on the space of probability measures and applications”, Ph.D thesis, Department of Electrical and Computer Engineering, University of Cyprus, January 2015.

[3] Ioannis Tzortzis. “Mathematical models for demography and its applications to Cyprus population”, Master thesis, Department of Electrical and Computer Engineering, University of Cyprus, May 2009.

[2] Ioannis Tzortzis.“Real time control of the ball and beam system”, Bachelor thesis, Department of Electrical Engineering and Informatics, Budapest University of Technology and Economics, June 2007.

[1] Ioannis Tzortzis. “Analysis of switching converters”, Diploma thesis, Department of Electrical Engineering, Higher Technical Institute, June 2003.