For most of us he was a friend, a teacher, an elder comrade, a colleague. A talented mathematician, a scientist with an extremely broad range of interests and knowledge, a man whose mind was exceptionally quick and responsive, he was always ready to start working on any problem. Georgy Maksimovich Adelson-Velsky was born in Samara on January 8, 1922. In 1940 he enrolled in the Faculty of Mechanics and Mathematics at Moscow State University. As a fourth-year student, in 1944 he generalized S.N. Bernstein’s theorem on a smooth function of two variables whose graph has negative curvature. He introduced the following definition: a continuous function of two variables has generalized non-positive curvature if no plane cuts off a ‘cap’ from the graph of the function, that is, for any plane in R, all the connected components into which the plane cuts the graph of the function are unbounded.

Спартак Тимофеевич Беляев (к 90-летию со дня рождения), Аксенов В.Л., Вакс В.Г., Велихов Е.П., Герштейн С.С., Зелевинский В.Г., Ковальчук М.В., Коршенинников А.А., Окунь Л.Б., Панченко В.Я., Саперштейн Э.Е., Скринский А.Н., Штромбах Я.И.

Юрий Георгиевич Абов (к 90-летию со дня рождения), Аксенов В.Л., Гулько А.Д., Данилов М.В., Данилян Г.В., Джепаров Ф.С., Елютин Н.О., Иоффе Б.Л., Козлов Ю.Ф., Львов Д.В., Окунь Л.Б., Стриханов М.Н., Федоров В.В.

theoretical physicist of world renown and correspondent member of the Russian Academy of Sciences, died at the age of 70. Born in Moscow, Kaidalov was educated in nuclear and elementary particle physics at the Engineering Physics Institute (MEPhI), from which he graduated in 1963. He completed his diploma thesis under the guidance of I Ya Pomeranchuk, who then headed the Theoretical Department at the Institute of Theoretical and Experimental Physics (ITEP), which Kaidalov joined soon after his graduation from MEPhI and to which he remained devoted to the end of his days. Having started his academic career as a junior researcher, he became the head of a theoretical laboratory. He defended his PhD thesis in 1968 and received the degree of a Doctor of Sciences in 1979. In 2003, Kaidalov was elected a correspondent member of the RussianAcademy of Sciences. Even at the onset of his carrier, the young researcher showed a keen scientific intuition, the ability to see the most essential features of physical phenomena and to offer a suitable theoretical interpretation. At that time, experiments at the ITEP and Protvino accelerators (and later at ISR at CERN) started yielding a plethora of information about high-energy hadron interactions. With basic studies in highenergy physics just gaining momentum at that time, the method of complex angular momenta based on the analyticity and unitarity of the scattering amplitude (the Reggeon theory) marked a real breakthrough in this domain. Kaidalov pioneered the application of this approach to a systematic description of the hadron±hadron interaction dynamics at high energies. His first work investigated the role of moving Regge cuts, a relevant problem at that time. Kaidalov predicted a number of striking qualitative effects arising from the contribution of cuts to the cross sections of two-particle processes, which were later confirmed in experiment. A thorough analysis of diffraction dissociation processes enabled Kaidalov to establish the lower bound for twoPomeron cuts, thereby removing any doubt as to the necessity of taking them into account. His analysis of inelastic diffraction processes was of paramount importance for understanding the structure of the Reggeon field theory. He was the first to derive the triple-Pomeron interaction constant that characterizes the contribution of more complicated (`enhanced') diagrams of the Reggeon field theory. The method of Reggeon dispersion sum rules proposed by Kaidalov was used to predict the exotic baryon resonance with spin and isospin 5/2. Kaidalov made an invaluable contribution to the theory of multiple high-energy processes. When most theorists regarded the first experimental data as a mere haphazard collection of plots and figures, Kaidalov identified the main experimental findings as the effects of multiperipheral dynamics and t-channel quantum numbers. He and his coworkers proposed a model of Reggeized one-pion exchange that permitted systematizing and quantitizing a large number of inclusive and exclusive reactions in a broad energy range. The advent of quantum chromodynamics required the general phenomenological results of the Reggeon theory to be reformulated in terms of quarks and gluons. Kaidalov developed a new approach to the description of multiple processes at high energies (known as the quark±gluon string model) based on fundamental features of the Reggeon method, the topological 1=N expansion of QCD amplitudes, and current views of the confinement mechanism. This model was used to clarify the relationship between different Regge trajectories, to theoretically estimate cross sections of multiple hadron processes, to quantitatively describe a multitude of inclusive processes, and to predict the masses and widths of new hadron resonances, including exotic ones. Moreover, the Uspekhi Fizicheskikh Nauk 181 (3) 341 ± 342 (2011) DOI: 10.3367/UFNr.0181.201103j.0341 Translated by Yu VMorozov PERSONALIA PACS number: 01.60.+q

Памяти Владимира Владимировича Бронфмана, Алексеев И.Г., Волошин М.В., Гиппиус Н.А., Данилов М.В., Казанцев Д.В., Миронов А.Д., Морозов А.Ю., Окунь Л.Б., Рубаков В.А., Свирида Д.Н., Семенов А.Л., Тиняков П.Г.

ing physicist theoretician whose work made a fundamental contribution to atomic physics, particle physics, and astrophysics, celebrated his 80th birthday on 13 July 2009. Semen Solomonovich was born in Harbin (Manchuria) into a family of Soviet citizens. In 1936, the family moved to the USSR. In 1937±1938, his parents were subjected to repressions but were completely rehabilitated in 1955±1956. From the age of eight, S.S. was raised by his grandmother A IMendelevich, who worked as amedical assistant at a firstaid post of an industrial plant. In 1946, S.S. finished secondary school with Gold Medal and enrolled in the Physics Department of Moscow State University. In 1951, he graduated from there and was sent to teach physics at a school in the village of Belousovo in Kaluga region, even though Professor A A Vlasov, who had supervised his graduation project, did everything humanly possible to have S.S. assigned to postgraduate courses or at least to some research establishment. In Belousovo he worked for three years. Despite his two-shift labor with the 40-hoursa-week load at school, S.S. managed to successfully pass all exams of the L D Landau theoretical minimum for one year add. He was the last person whom L D Landau examined personally at each exam. With the theoretical minimum exams out of the way, L D Landau recommended S.S. to Ya B Zel'dovich, who at that time, simultaneously with his work on `special topics at the secret workplace', was starting to think about the theory of beta-decay. Together with Ya B Zel'dovich, S.S. studied what changes in the constants of b-decay occur because the `bare' nucleon is surrounded by a pion `coat'. The authors did not limit their analysis only to the scalar (S) and the tensor (T) versions of b-decay, which at that moment were considered experimentally established; they also discussed the vector (V) and the axial-vector (A) versions. Using the results of Ya B Zel'dovich's earlier paper on the b-decay of the pion, which is possible only for the vector version, the authors concluded that the constant of the vector version of b-decay is not affected by the strong interaction between nucleons and pions. They were so impressed with the emerging analogy between the weak and the electromagnetic interactions that they dared to publish this result in a letter to Zh. Eksp. Teor. Fiz., where they wrote: ``Being of no practical significance, it is nevertheless of interest methodologically that the identity gF…V † g 0 F…V † would hold in the vector (V) version of the interaction''Ð that is, the value of the vector constant for the Fermi interaction be equal to its value for the `bare' nucleon.'' And further on: ``...this result can be foreseen by analogy to the Ward theorem in relation to the interaction of charged particles with the electromagnetic field: in this case the virtual processes involving the particles ... do not result in renormalizing the electric charge of the particle'' (Zh. Eksp. Teor. Fiz. 29 698±699 (1955)). This was S.S.'s first published paper. Three years later, after R Feynman±M Gell-Mann and R Marshak±E Sudarshan created the …VÿA† theory of the universal weak interaction, this conclusion gained fundamental importance. In the process, R Feynman and M GellMann rediscovered the results obtained by S.S. and Ya B Zel'dovich. They started with the observation that the lifetime of the muon calculated using the constant of the vector interaction of a neutron's b-decay coincides within 2% with the experimentally established value. They called the independence of the vector constant of the weak interaction from the strong interaction between nucleons the `hypothesis of conservation of vector current' (CVC). For this hypothesis to be true, they had to assume that there exists the process of b-decay of the pion that Ya B Zel'dovich discussed earlier on the basis of the universality of the weak interaction and the composite structure of the isotopic triplet of pions. R FeynUspekhi Fizicheskikh Nauk 179 (7) 807 ± 808 (2009) DOI: 10.3367/UFNr.0179.200907m.0807 Translated by V I Kisin PERSONALIA PACS number: 01.60.+q

Научная сессия Отделения физических наук Российской академии наук, посвященная 100-летию со дня рождения Л.Д. Ландау (22, 23 января 2008 г.), Андреев А.Ф., Каган Ю.М., Питаевский Л.П., Халатников И.М., Каменщик А.Ю., Иоффе Б.Л., Окунь Л.Б., Липатов Л.Н.

A scientific session of the Physical Sciences Division of the Russian Academy of Sciences dedicated to the centenary of L D Landau's birth was held in the Conference Hall of the Lebedev Physics Institute, Russian Academy of Sciences, on 22 and 23 January 2008. An Opening Address by A F Andreev and the following reports were presented at the session: (1) Andreev A F (Kapitza Institute of Physical Problems, Russian Academy of Sciences) Supersolidity of quantum glasses (2) Kagan Yu M (Russian Research Center Kurchatov Institute, Moscow) kinetics of the Bose condensate and long-range order; (3) Pitaevskii L P (Kapitza Institute of Physical Problems, Russian Academy of Sciences; Dipartimento di Fisica, Universita di Trento and BDC Center, Trento, Italy) Fermi liquid in a unitary regime; (4) Lebedev V V (Landau Institute for Theoretical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region) Kolmogorov, Landau, and the modern theory of turbulence; (5) Khalatnikov I M (Landau Institute for Theoretical Physics, Russian Academy of Sciences, Moscow), Kamenshchik A Yu (Landau Institute for Theoretical Physics, Russian Academy of Sciences, Moscow; Dipartimento di Fisica and Istituto Nazionale di Fisica Nucleare, Bologna, Italy) Landau and the problem of singularities in cosmology; (6) Ioffe B L (Russian State Scientific Center Alikhanov Institute for Theoretical and Experimental Physics, Moscow) anomaly in quantum electro- and chromodynamics and the structure of the vacuum in quantum chromodynamics; (7) Okun L B (Russian State Scientific Center Alikhanov Institute for Theoretical and Experimental Physics, Moscow) theory of relativity and the Pythagorean theorem; (8) Lipatov L N (St. Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg) and Regge asymptotics of scattering amplitudes in QCD and in supersymmetric gauge models. A brief presentation of the Opening Address by A F Andreev and reports 2, 3, and 5 — 8 is given below. • L D Landau: 100th anniversary (Introductory talk), A F Andreev Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 601–602 • Formation kinetics of the Bose condensate and long-range order, Yu M Kagan Physics-Uspekhi, 2008, Volume 51, Number 6, Page 603 • Superfluid Fermi liquid in a unitary regime, L P Pitaevskii Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 603–608 • Lev Landau and the problem of singularities in cosmology, I M Khalatnikov and A Yu Kamenshchik Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 609–616 • Axial anomaly in quantum electro- and chromodynamics and the structure of the vacuum in quantum chromodynamics, B L Ioffe Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 616–622 • The theory of relativity and the Pythagorean theorem, L B Okun Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 622–631 • Bjorken and Regge asymptotics of scattering amplitudes in QCD and in supersymmetric gauge models, L N Lipatov Physics-Uspekhi, 2008, Volume 51, Number 6, Pages 631–636

Владимир Сергеевич Имшенник (к 80-летию со дня рождения), Блинников С.И., Боброва Н.А., Варшалович Д.А., Герштейн С.С., Зацепин Г.Т., Матвеев В.А., Надёжин Д.К., Окунь Л.Б., Ряжская О.Г., Сасоров П.В., Сюняев Р.А., Утробин В.П.

Памяти Александра Леонидовича Суворова, Абов Ю.Г., Велихов Е.П., Данилов М.В., Илькаев Р.И., Ковальчук М.В., Окунь Л.Б., Оныкий Б.Н., Румянцев А.Ю., Рыкованов Г.Н., Смирнов В.П., Солонин М.И., Шарков Б.Ю.

Александр Николаевич Скринский (к семидесятилетию со дня рождения), Барков Л.М., Беляев С.Т., Бондарь А.Е., Данилов М.В., Диканский Н.С., Кругляков Э.П., Кулипанов Г.Н., Мешков И.Н., Окунь Л.Б., Пархомчук В.В., Сидоров В.А., Шатунов Ю.М.