Master Thesis: Harmonic maps and Sinh-Gordon type equations, Department of Mathematics,  AUTh, (2019)

     PhD Thesis: Sinh-Gordon type equations and harmonic maps, Department of Mathematics, AUTh (2024)

Research works:

1) Fotiadis A., Polychrou G., Explicit harmonic and wave maps into variable-curvature surfaces. Preprint, https://arxiv.org/abs/2512.18376

2) Polychrou G. Functional separation solutions of the sinh-Gordon type equations. Canadian Mathematical Bulletin. (2025);68(4):1374-1388. https://doi:10.4153/S0008439525100799 

3) Polychrou, G., Papageorgiou, E., Fotiadis, A. et al. New examples of harmonic maps to the hyperbolic plane via Bäcklund transformation. Rev Mat Complut 37, 833–859 (2024). https://doi.org/10.1007/s13163-023-00476-z 

4) Polychrou, G. Solutions of the sinh-Gordon and sine-Gordon equations and applications. J Elliptic Parabol Equ 9, 611–625 (2023). https://doi.org/10.1007/s41808-023-00214-y