Emil Horozov
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Emil Horozov (born 27 September 1949,
Sofia Sofia ( ; bg, София, Sofiya, ) is the capital and largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain in the western parts of the country. The city is built west of the Iskar river, and h ...
) is a Bulgarian
mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...
known for his work in
dynamical systems theory Dynamical systems theory is an area of mathematics used to describe the behavior of complex dynamical systems, usually by employing differential equations or difference equations. When differential equations are employed, the theory is called '' ...
and
mathematical physics Mathematical physics refers to the development of mathematical methods for application to problems in physics. The '' Journal of Mathematical Physics'' defines the field as "the application of mathematics to problems in physics and the developme ...
and work related to
Hilbert's sixteenth problem Hilbert's 16th problem was posed by David Hilbert at the Paris conference of the International Congress of Mathematicians in 1900, as part of his list of 23 problems in mathematics. The original problem was posed as the ''Problem of the topolo ...
.


Education

Horozov obtained Master's degree from
Sofia University Sofia University, "St. Kliment Ohridski" at the University of Sofia, ( bg, Софийски университет „Св. Климент Охридски“, ''Sofijski universitet „Sv. Kliment Ohridski“'') is the oldest higher education i ...
in 1972 and then got his Ph.D. from
Moscow State University M. V. Lomonosov Moscow State University (MSU; russian: Московский государственный университет имени М. В. Ломоносова) is a public research university in Moscow, Russia and the most prestigious ...
in 1978, where he was under the supervision of V. I. Arnold and Y. V. Egorov. His thesis was ''Bifurcations of symmetric vectorfields on the plane''. In 1990, Horozov obtained his D.Sc. degree, this time from Sofia University, after completing his thesis, which was titled ''Hamiltonian systems and Abelian integrals''.


Career

Horozov was an assistant professor at Sofia University for ten years before accepting associate professor position in 1984. He was promoted to professor ten years later, and served as such at the same institution until 2002, when he decided to become senior researcher at the Institute of Mathematics and Computer Science. He retained his professorship in 2006 and since that year relocated to
University of California, Santa Barbara The University of California, Santa Barbara (UC Santa Barbara or UCSB) is a public land-grant research university in Santa Barbara, California with 23,196 undergraduates and 2,983 graduate students enrolled in 2021–2022. It is part of the U ...
. During his years as professor, Horozov was also a visiting professor to
Vrije Universiteit Amsterdam The Vrije Universiteit Amsterdam (abbreviated as ''VU Amsterdam'' or simply ''VU'' when in context) is a public research university in Amsterdam, Netherlands, being founded in 1880. The VU Amsterdam is one of two large, publicly funded research ...
from June 1985 to October 1986, as well as to
Brandeis University , mottoeng = "Truth even unto its innermost parts" , established = , type = Private research university , accreditation = NECHE , president = Ronald D. Liebowitz , ...
in 1986, 1987, and 1998 respectively. He also was visiting professor to the
University of Arizona The University of Arizona (Arizona, U of A, UArizona, or UA) is a public land-grant research university in Tucson, Arizona. Founded in 1885 by the 13th Arizona Territorial Legislature, it was the first university in the Arizona Territory. T ...
from August 1991 to May 1992 and to the
University of Bremen The University of Bremen (German: ''Universität Bremen'') is a public university in Bremen, Germany, with approximately 23,500 people from 115 countries. It is one of 11 institutions which were successful in the category "Institutional Strategi ...
in June 1991 and February 1993. In May 1997, Horozov became a visiting professor at the
University of Florence The University of Florence (Italian: ''Università degli Studi di Firenze'', UniFI) is an Italian public research university located in Florence, Italy. It comprises 12 schools and has around 50,000 students enrolled. History The first universi ...
and then served as such at
Artois University The University of Artois ( French: ''Université d'Artois'') is a public university situated in the Nord and Pas-de-Calais departments of northern France. It is situated on 5 campuses in Arras, Béthune, Douai, Lens and Liévin. The Univ ...
in July 1999, the
University of Nantes The University of Nantes (french: Université de Nantes) is a public university located in the city of Nantes, France. In addition to the several campuses scattered in the city of Nantes, there are two satellite campuses located in Saint-Nazaire ...
in January 2000, and at the
University of Leeds , mottoeng = And knowledge will be increased , established = 1831 – Leeds School of Medicine1874 – Yorkshire College of Science1884 - Yorkshire College1887 – affiliated to the federal Victoria University1904 – University of Leeds , ...
in April 2001.


Works

Among his best known mathematical works are "Versal deformations of equivariant vector fields for cases of symmetry of order two and three" (Ph.D. thesis, 1979), "On the number of limit cycles in perturbations of quadratic Hamiltonian systems" (joint with I. D. Iliev), "Some functions that generalize the Krall-Laguerre polynomials" (joint with F. A Grünbaum and L. Haine), and "Perturbations of the spherical pendulum and Abelian integrals".


Corruption allegations

He was the head of the Bulgarian National Science Fund until his resignation in February 2011 after suffering reprisals for combating corruption in the institution. In 2014 Sofia University decided to retire prematurely Professor Emil Horozov contrary to the rules and the practice of the University. In this relation an open Letter addressed to the Rector Ivan Ilchev and the Members of the Academic Council of Sofia University “St. Kliment Ohridski’’ was published in the Newsletter of the European Mathematical Society. The letter has not received an official answer. Later the first instance Bulgarian court has decided that the act of Sofia University violates the law and that Professor Horozov must be returned to his job.Decision N° II-56 from 16.02.2015 of the Sofia Regional Court
(in Bulgarian).


References

{{DEFAULTSORT:Horozov, Emil 1949 births Living people Corresponding Members of the Bulgarian Academy of Sciences Moscow State University alumni Sofia University alumni Academics of the University of Leeds Brandeis University faculty University of Bremen faculty University of Florence faculty University of Nantes faculty Vrije Universiteit Amsterdam faculty 20th-century Bulgarian mathematicians 21st-century Bulgarian mathematicians