PhD thesis defense of Marina Pavlova Tchomakova on " Geometry of Paraquaternionic Contact Manifolds" for awarding the educational and science degree "Doctor" in the professional field 4.5. Mathematics, doctoral programme “Geometry”.

Scientific supervisors: Prof. Stefan Petrov Ivanov, Doctor of mathematical sciences and Prof. Ivan Minchev Minchev, DSc

Chairperson of the scientific panel: Assoc. Prof. Yulian Tsankov Tsankov, PhD - Sofia University “St. Kliment Ohridski”

Abstract of Marina Pavlova Tchomakova

Reviews:

Prof. Mancho Hristov Manev, DSc

Assoc. Prof. Aleksander Vladimirov Petkov, PhD

Statement reports:

Prof. Johann Todorov Davidov, Doctor of mathematical sciences

Prof. Velichka Vasileva Milousheva-Godinyachka, PhD

Assoc. Prof. Yulian Tsankov Tsankov, PhD

Published: 12 September 2025