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Victor Ivrii
Born	(1949-10-01) 1 October 1949 (age 75) Sovetsk, Kaliningrad Oblast, Russian SFSR, Soviet Union
Citizenship	Canadian
Alma mater	Novosibirsk State University,
Awards	Fellow of the Royal Society of Canada 1998, Killam Research Fellow, 2002-2004 Fellow of American Mathematical Society, 2012.
Scientific career
Fields	Mathematics
Institutions	Magnitogorsk Technical University École Polytechnique University of Toronto
Doctoral advisor	Sergey Sobolev

Victor Ivrii (Russian: Виктор Яковлевич Иврий),^[1] FRSC (born 1 October 1949)^[2] is a Russian, Canadian mathematician who specializes in analysis, microlocal analysis, spectral theory and partial differential equations. He is a professor at the University of Toronto Department of Mathematics.

He was an invited speaker at International Congress of Mathematicians, Helsinki—1978 and Berkeley—1986.^[3]

Education and Degrees

He graduated from Physical Mathematical School at Novosibirsk State University in 1965, received his University Diploma (equivalent to MSci) in 1970 and PhD in 1973 in Novosibirsk State University. He defended his Doktor nauk thesis in St. Petersburg Department of Steklov Institute of Mathematics of Russian Academy of Sciences in 1982.^[4]

Scientific contributions

Weakly hyperbolic equations

His first main works were devoted to the well-posedness of the Cauchy problem for weakly hyperbolic equations. In particular he discovered a necessary (later proven to be sufficient) condition for Cauchy problem to be well-posed no matter what the lower terms in the equation are.^[5]

Propagation of singularities

In a series of papers he explored propagation of singularities of symmetric hyperbolic systems inside of the domain and near the boundary. He was invited to give a talk at ICM—1978, Helsinki but was not granted an exit visa by the Soviet authorities;^[6] however his talk ^[7] was published in the Proceedings of the Congress.

Asymptotic distribution of eigenvalues

His work in propagation of singularities logically guided him to the theory of asymptotic distribution of eigenvalues (a subject he has been studying ever since). V. Ivrii's debut in this field was a proof of Weyl conjecture (1980). Then he developed a rescaling technique which allowed to consider domains and operators with singularities. He again was invited give a talk at ICM—1986, Berkeley but again was not granted an exit visa by the Soviet authorities. His talk ^[8] was read by Lars Hörmander and published in the Proceedings of the Congress.

V. Ivrii wrote three research monographs,^[9]^[10] and,^[11] all published by Springer-Verlag.

Multiparticle quantum theory

The methods developed by V. Ivrii were very useful for the rigorous justification of Thomas-Fermi theory. Together with Israel Michael Sigal he justified the Scott correction term for molecules.^[12] Later V. Ivrii justified the Dirac and Schwinger correction terms.

Institutions

1973-1990 Magnitogorsk Mining and Metallurgical Institute
1990-1992 École Polytechnique
1992–present University of Toronto Department of Mathematics

Awards and honors

1998 Elected as Fellow of Royal Society of Canada.^[13]
2002-2004 Killam Research Fellow.^[14]^[15]
2012 Fellow of the American Mathematical Society.^[16]

References

^ Персоналии: Иврий Виктор Яковлевич
^ http://weyl.math.toronto.edu/victor_ivrii_Publications/vita.pdf
Victor Ivrii was born October 1, 1949 in Sovetsk, USSR
^ ICM Plenary and Invited Speakers
^ V. Ivrii' C.V.
^ V. Ya. Ivrii, V M Petkov, Necessary conditions for the Cauchy problem for non-strictly hyperbolic equations to be well-posed, Russian Math. Surveys, 1974, 29 (5), 1–70
^ International Congress of Mathematicians#Soviet participation
^ "Propagation of singularities of solutions of symmetric hyperbolic systems" (PDF). Archived from the original (PDF) on 2012-05-23. Retrieved 2011-12-25.
^ "Estimates for the number of negative eigenvalues of the Schrödinger operator with singular potentials" (PDF). Archived from the original (PDF) on 2012-05-23. Retrieved 2011-12-25.
^ Precise Spectral Asymptotics for Elliptic Operators Acting in Fiberings over Manifolds with Boundary, 1984, 238pp
^ Microlocal Analysis and Precise Spectral Asymptotics, 1998, 731pp
^
Microlocal Analysis, Sharp Spectral Asymptotics and Applications, 2019,
^ V. Ivrii, M. I. Sigal. Asymptotics of the ground state energies of Large Coulomb systems, Annals of Mathematics 138 (1993), 243-335.
^ fr:Liste des membres de la Société royale du Canada (1997-2005)
^ fr:Liste des boursiers Killam, par ordre alphabétique I
^ List of Killam Research Fellows^{[permanent dead link‍]}
^ List of Fellows of the American Mathematical Society, retrieved 2013-01-26.

External links

Authority control databases
International	ISNI VIAF WorldCat
National	Germany United States Czech Republic Netherlands Norway Israel Belgium
Academics	Mathematics Genealogy Project zbMATH MathSciNet
People	DDB
Other	IdRef

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