Draft:Vasily Ivanovich Vasyunin

Vasily Ivanovich Vasyunin (Василий Иванович Васюнин, born on October 23, 1948) is a Russian mathematician, specializing in Linear and complex analysis, operator models, spectral theory of operators, harmonic analysis, Bellman function method..

Vasily Vasyunin has received his Candidate of Sciences degree (PhD) from Leningrad branch of Steklov Institute of Mathematics in 1976 under guidance of Nikolai Kapitonovich Nikolski with thesis "Unconditionally convergent spectral decompositions and interpolation problems" (title translated from Russian). In 1992 Vasily Vasyunin has received his Doctor of Sciences degree also from from Leningrad branch of Steklov Institute of Mathematics.

Vasily Vasyunin has devoted his scientific career to the Steklov Institute of Mathematics since 1975 till present moment having started in the role of junior researcher in up to the role of leading researcher nowadays. At the same time Vasily Vasyunin reads lectures and hosts seminars in Chebyshev Laboratory of St. Petersburg State University.

Throughout all the years of scientific activity Vasily Vasyunin has been invited as a visiting professor to a number of leading foregin scientific institutions:

1983 Karl Marx University, Leipzig, East Germany

1984 Janos Bolyai Institute, Szeged, Hungary

1986 Mathematical Institute, Prague, Czechoslovakia

1989 University of Kuwait, Kuwait

1991 University of Seville, Spain

1993 University of Bordeaux-I, France

1994 University of Bordeaux-I, France

1995 University of Bordeaux-I, France

1995 Mathematical Sciences Research Institute, Berkeley, USA

1996 Californian Institute of Technology, Pasadena, USA

1996 University of Bordeaux-I, France

1997 University of Seville, Spain

2000 Chalmers Institute of Technology, Gothenburg, Sweden

2000 University of Seville, Spain

2001 Michigan State University, USA

2001 California Institute of Technology, USA

2002 University of Bordeaux-I, France

2002 University of Seville, Spain

2003 Michigan State University, USA

2004 NTNU, Trondheim, Norway

2005 Michigan State University, USA

2006 Michigan State University, USA

2007 Michigan State University, USA

2011 University of Cincinnati, USA

2016 Michigan State University, USA

Selected bibliography

• V. I. Vasjunin, A nonstationary interpretation of the reflection coefficient, Zap. Nauchn. Semin. LOMI 39 (1974), 17{29 (in Russian, English translation in: J. Math. Sci. (prior 1994 J. Soviet Math.) 8 (1977), no. 1, 9{19).
• V. I. Vasjunin, Bases from eigensubspaces, and nonclassical interpolation problems, Funkts. Anal. i Prilozh. 9 (1975), no. 4, 65{66 (in Russian).
• V. I. Vasjunin, Unconditionally convergent spectral expansions, and nonclassical interpolation, Dokl. Akad. Nauk SSSR 227 (1976), no. 1, 11-14 (in Russian, English transl. in: Soviet Math. Dokl. 17 (1976), no. 2, 309-313).
• N. K. Nikol'skii, B. S. Pavlov and V. I. Vasjunin, Spectral decompositions and the Carleson condition, Zap. Nauchn. Semin. LOMI 81 (1978), 96-98 (in Russian, English translation in: J. Math. Sci. (prior 1994 J. Soviet Math.) 26 (1984), no. 5, 2152-2153).
• N. G. Makarov and V. I. Vasjunin, Model for noncontractions and stability of the continious spectrum, Lect. Notes Math. 864 (1981), 365-412
• N. K. Nikol'skii and V. I. Vasjunin, Control subspaces of minimal dimension. An elementary introduction. Discotheca, Zap. Nauchn. Semin. LOMI 113 (1981), 41-75 (in Russian, English translation in: J.Math. Sci. (prior 1994 J. Soviet Math.) 22 (1983), no. 6, 1719-1738).
• V. I. Vasyunin, Multiplicity of contractions with _nite defect indices, Dokl. Akad. Nauk SSSR 304 (1989), no. 5, 1041{1045 (in Russian, English transl. in Soviet Math. Dokl. 39 (1989), no. 1, 178{181)
• S. R. Treil and V. I. Vasyunin, The inverse spectral problem for the modulus of a Hankel operator, Algebra i Analiz 1 (1989), no. 4, 54-66 (in Russian, English transl. in Leningrad Math. J. 1 (1990), no. 4, 859-870)
• V. I. Vasyunin, On a biorthogonal system related with the Riemann hypothesis, Algebra i Analiz 7 (1995), no. 3, 118-135 (in Russian, English transl. in St.-Petersburg Math. J. 7, no. 3)
• V. V. Peller and V. I. Vasyunin, Analytic approximation of rational matrix functions, Indiana Univ. Math. J. 56 (2007), no. 3, 1913-1937
• S. Bermudo, K. H. Mancera, P. J. Paul, V. Vasyunin, Quasisimilarity of contractions having 2_1 characteristic function, Revista Matematica Iberoamericana 23 (2007), no. 3, 673-704
• V. I. Vasyunin, Mutual estimates of Lp-norm and Bellman function, Zap. Nauchn. Semin. LOMI 355 (2008), 81{138 (in Russian, English translation in: J. Math. Sci. 156 (2009), no. 5, 766-798).
• V. Vasyunin, A. Volberg, Monge-Ampère Equation and Bellman Optimization of Carleson Embedding Theorems, Translations of the American Mathematical Society, vol. 226 (2009), 195-238.
• A. Reznikov, V. Vasyunin, A. Volberg, An observation: cut-off of the weight w does not increase the Ap1;p2-norm of w, preprint, 2010
• L. Slavin, V. Vasyunin, Sharp results in the integral-form John-Nirenberg inequality, Trans. Amer. Math. Soc. 363 (2011), 4135-4169.
• H. Hedenmalm, D. M. Stolyarov, V. I. Vasyunin, P. B. Zatitskiy, Sharpening Hoelder's inequality, Journal of Functional Analysis, 275 (2018), 1280-1319.
• Paata Ivanisvili, Dmitriy M. Stolyarov, Vasily I. Vasyunin, Pavel B. Zatitskiy, Bellman function for extremal problems in  II: evolution, Memoirs of the AMS, number 1220, vol. 255, 2018
• V.I.Vasyunin, A. Volberg, The Bellman Function Technique in Harmonic Analysis, Cambridge Univesity Press, 2020