Vahagn "Vahe" Gurzadyan (; born 21 November 1955) is an Armenian mathematical physicist and a professor and head of Cosmology Center at Yerevan Physics Institute, Yerevan , Armenia, best known for co-writing "Concentric circles in WMAP data may provide evidence of violent pre-Big-Bang activity" paper with his colleague, Roger Penrose, and collaborating on Roger Penrose's recent book Cycles of Time. Gurzadyan was born in Yerevan, Armenia (then Soviet Union), graduated Yerevan State University (1977), postgraduate student in theoretical physics department, Lebedev Physics Institute, Moscow (1977–1980; 1980 PhD.), DSci in theoretical and mathematical physics (1988). In 1989 he lectured on dynamical systems in four universities in Japan (Tokyo, Kyoto, Hiroshima, Fukui), and subsequently held visiting positions at the University of Sussex (1996–1997) and, since 2001, at Sapienza University of Rome. His father Grigor Gurzadyan, an Armenian astronomer pioneered space-based astronomy using satellites. His grandfather Ashkharbek Kalantar was a Russian Empire and Armenian archaeologist and historian, Fellow of Russian Imperial Archaeological Society and the keeper of the Asiatic Museum in St. Petersburg. Main research The main topics of his research: chaos in non-linear systems, accretion onto massive black holes, stellar dynamics, observational cosmology. Gurzadyan has papers predicting elliptical accretion disks formed in galactic nuclei at tidal disruption of stars near massive black holes; the tidal mechanism currently is associated to the flares observed in AGN. He has shown (with Savvidy; Gurzadyan-Savvidy relaxation) the exponential instability (chaos) in spherical stellar systems and has derived the collective relaxation time. He has formulated a list of 10 key problems in stellar dynamics He has proved a theorem (Gurzadyan theorem) on the most general functional form for the force satisfying the condition of identity of the gravity of the sphere and of a point mass located in the sphere's center. Cosmic microwave background indications for cosmic voids were obtained by Gurzadyan et al., including on the void nature of the Cold Spot, confirmed by independent galaxy survey, as of possibly largest known structure in the Universe. Gurzadyan has suggested and initiated the use of Compton Edge method for high accuracy testing of the light speed isotropy and the Lorentz invariance at GRAAL experiment in European Synchrotron Radiation Facility (Grenoble); the obtained limit became a reference number for Special Relativity extension models. Other topics Gurzadyan has invented the concept of information panspermia which Webb attributed as Solution 23 of Fermi Paradox. That concept includes the hypothesis that