Preprints

Demirci, Y. E., Kara, A. D., and Yüksel S.. Sensitivity of Filter Kernels and Robustness to Incorrect Transition and Measurement Kernel Perturbations in Partially Observable Stochastic Control . arXiv:2508.10658v3

Demirci, Y. E., and Yüksel S.. Unique Ergodicity of Non-Linear Filters via Reachability and Uniform Weak Continuity. arXiv:2307.15764v4

Demirci, Y. E., Kara, A. D., and Yüksel S.. Refined Bounds on Near Optimality Finite Window Policies in POMDPs and Their Reinforcement Learning. arXiv:2409.04351

Publications

Demirci, Y. E., Kara, A. D., and Yüksel S.(2024). Average Cost Optimality of Partially Observed MDPs: Contraction of Non-Linear Filters and Existence of Optimal Solutions and Approximations. SIAM Journal on Control and Optimization, 2024.

Demirci, Y., Işlak, Ü, and Özdemir, A. (2023). Mixing time bounds for edge flipping on regular graphs. Journal of Applied Probability, 1-16. doi:10.1017/jpr.2023.3

Çiçeksiz, A., Demirci, Y. E., and Işlak, Ü. (2023). The Variance and the Asymptotic Distribution of the Length of Longest $ k $-alternating Subsequences. Discrete Mathematics and Theoretical Computer Science, 25(1). https://doi.org/10.46298/dmtcs.10296

Demirci, Y. E., Ekim, T., and Yıldız, M. A. (2023). Defective Ramsey Numbers and Defective Cocolorings in Some Subclasses of Perfect Graphs. Graphs and Combinatorics, 39(1), [18]. https://doi.org/10.1007/s00373-023-02612-4

Demirci, Y. E., Işlak, Ü., and Yıldız, M. A. (2023). On a cover time problem on a dynamic graph with steps at random times. Statistics and Probability Letters, 197, [109821]. https://doi.org/10.1016/j.spl.2023.109821

Demirci, Y. E., Ekim, T., Gimbel, J., and Yıldız, M. A. (2021). Exact values of defective Ramsey numbers in graph classes. Discrete Optimization, 42, [100673]. https://doi.org/10.1016/j.disopt.2021.100673

Conference Proceedings

Demirci, Y. E., Kara, A. D., Yüksel S.(2025). Sensitivity of Filter Kernels and Robustness to Incorrect Transition and Measurement Kernel Perturbations in Partially Observable Stochastic Control. 2025 IEEE 64th Conference on Decision and Control (CDC 2025), Rio de Janeiro, Brazil, December 10-12, 2025

Demirci, Y. E., Kara, A. D., Yüksel S.(2025). Wasserstein Regularity of Nonlinear Filters As Belief-MDPs, and Implications on Ergodicity, Optimality and Learning for POMDPs. 2025 American Control Conference (ACC 2025), Denver, CO, USA, July 8-10, 2025

Demirci, Y. E., Kara, A. D., Yüksel S.(2024). Average Cost Optimality of Partially Observed MDPs: Contraction of Non-Linear Filters and Existence of Optimal Solutions and Approximations. 2024 American Control Conference (ACC 2024), Toronto, Canada, July 8-12, 2024

Conference and Workshop Presentations

July 2025 – Wasserstein Regularity of Nonlinear Filters As Belief-MDPs, and Implications on Ergodicity, Optimality and Learning for POMDPs, ACC 2025, Denver, Colorado, USA.

May 2025 – Stability, Ergodicity, and Optimal Control in Partially Observed Markov Processes: Wasserstein Contraction Approach, 10th Meeting on System and Control Theory, HEC Montréal, Montréal, QC, Canada.

July 2024 – Average Cost Optimality of Partially Observed MDPs: Contraction of Non-Linear Filters and Existence of Optimal Solutions and Approximations, ACC 2024, Toronto, ON, Canada.

December 2023 – On Regularity and Ergodicity of Partially Observable Markov Decision Processes, CMS Winter Meeting, Stochastic Control Theory and Applications, Montréal, QC, Canada.

May 2023 – Unique Ergodicity of Non-Linear Filters, 9th Meeting on System and Control Theory, University of Waterloo, Waterloo, ON, Canada.