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Spiros Cotsakis

College positions:
Visiting Fellow
Institute of Gravitation and Cosmology, RUDN University
Contact details:

Professor Spiros Cotsakis

Spiros Cotsakis is Professor of Cosmology at the Institute of Gravitation and Cosmology of RUDN University.

Professor Spiros Cotsakis studies the new interface between bifurcation theory, cosmology, black holes, and general relativity.

Professor Spiros Cotsakis works on the intricate mathematics of bifurcation theory (originally discovered by Huygens, Chladni, and Lord Rayleigh, later as a branch of dynamical systems by H. Poincare and A. A. Andronov, and since the early 1970’s in its modern form developed by V. I. Arnold and other mathematicians), and applies them to the deepest problems of cosmology, black holes, and general relativity.

In the 1980’s, Professor Cotsakis studied mathematics in the University of Athens, did his postgraduate work (M.Sc.) in Astronomy and his PhD under the mentorship of J. D. Barrow at the University of Sussex, UK.

In the early 1990’s, Professor Cotsakis joined the newly formed mathematics department of the University of the Aegean, Greece, and for the next two decades he raised to become a Full Professor, a head of department, and Senate member, and worked there and at the new department of systems engineering, both of which he helped develop.

Professor Cotsakis has been a Research Associate at CERN, and since 2020 he holds a research professorship at the Institute of Gravity and Cosmology, RUDN University (distant work). He has also been a visiting professor at various universities and centres around the world.

Professor Cotsakis has also been active in science communication, has written many popular articles, taken part as principal contributor in various programs for radio and television, and has organised important international Conferences, Schools, and Workshops in the past three decades.

At Clare Hall, Spiros is accompanied by his wife Eugenia Zalachori, a distinguished Greek lawyer (B.Sc. University of Athens (summa cum laude), LLM from UCL, UK) who led the Legal Department of the Chandris Group for nearly three decades.

Select publications

  • S. Cotsakis, Dispersive Friedmann universes and synchronization, Gen. Rel. Grav. 55 (2023) 61; arXiv:2208.07892
  • S. Cotsakis, Dynamical synchronization, the horizon problem, and initial conditions for inflation, Lett. HEP 322 (2023) 1; arXiv:2208.07104
  • S. Cotsakis, J.P. Mimiso, J. Miritzis, Legendre scalarization in gravity and cosmology, Eur. Phys. J. C. 83 (2023) 433; arXiv:2305.04011
  • Antoniadis, S. Cotsakis, D. Trachilis, Sudden Shock Waves in modified gravity, Eur. Phys. J. C. 83 (2023) 491; arXiv:2304.13291
  • S. Cotsakis and A. P. Yefremov, 100 years of mathematical cosmology: Models, theories, and problems, Phil. Trans. R. Soc. A380 (2022) 20210171 (Part A), 20210191 (Part B); arXiv:2203.16443
  • Antoniadis, S. Cotsakis, I. Klaoudatou, Regular braneworlds with nonlinear bulk-fluids, Eur. Phys. J. C 81, 771 (2021); arXiv: 2106.15669
  • J.D. Barrow, S. Cotsakis, Inflation without a trace of Lambda, Eur. Phys. J. C80 (2020) 839; arXiv:1907.02928
  • J.D. Barrow, S. Cotsakis and D. Trachilis, The Generic Sudden Singularity in Brans-Dicke Theory, Eur. Phys. J. C 80, 1197 (2020); arXiv: 2009.01732

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