As the academician himself said, the foundation of spiritual life is laid precisely in the early years and depends on the family, environment and school. He grew up in the village of Kara-Oba in the post-war years, they were very difficult, but memorable, as the scientist recalls. It was a period of some kind of special unity of people who were distinguished by their cordiality and kindness. Sultangazin's parents, who worked from morning till night on the collective farm, raised him not by words, but by personal example, so he was accustomed to work from early childhood.

Mathematics is the queen of sciences, it does not tolerate inexactness and negligence. Therefore, a scientist-mathematician should be extremely careful and attentive, so not to deviate from the truth.

Indeed, it is difficult when you start dealing with objects that you never experienced, did not see, but when you get involved in it and start thinking abstractly, you begin to feel the power of human thinking, the power of modern mathematics, to understand that this is not a game, but a reflection of the real world.

The aim of the present paper is to show how the decoupling method proposed in a [1964 paper by Marchuk and N N Janenko] can be applied to the diffuse reflection and transmission problem of light by a finite, isotropically scattering atmosphere with an emission source and the appropriate boundary conditions.

The first-order integro-differential equation governing stationary, one-velocity radiation transfer in a medium with isotropic scattering and production and absorption of radiation is considered. The medium is assumed to be bounded and convex, with a piecewise smooth boundary, and properties of the medium are described by piecewise continuous functions of position. No reflections are permitted at the boundary. A function space is defined which contains generalised solutions satisfying the equation and the boundary condition almost everywhere in the medium.

I was his student. His lectures made me a specialist in the field of numerical methods for problems of mathematical physics.

The main portion of this book is devoted to the analysis of the method of spherical harmonics as applied to the time-dependent linear Boltzmann equation describing the behaviour of particles interacting with the host medium but not among themselves. Such a situation arises in nuclear reactor theory, astrophysics, plasma physics and related fields. It is assumed that the host medium is isotropic and all the particles have the same speed. The boundary condition is such that no particles are coming in from the vacuum surrounding the system. ...

The book is a comprehensive, yet not exhaustive, review of basic and recent results for discrete-velocity realisations of the nonlinear Boltzmann equation. Many of these results are due to the author, who is one of the foremost researchers in this domain. ... The first chapter reviews the connection between kinetics and hydrodynamics and the derivation of the discrete Boltzmann equation for monatomic model gases. The second chapter deals with the spatially homogeneous discrete models. ... The third chapter is devoted to the rigorous analysis of the evolution problem. ... In the fourth chapter the author presents different methods of solving the discrete Boltzmann equation. Despite a certain lack of sparkle, this book reflects the serious and reliable quality one has been accustomed to expect from the Russian school in kinetic theory.

This monograph, written by a team of authors from Czechoslovakia and the Soviet Union, is devoted to theoretical and algorithmic aspects of the spherical harmonics method as applied to the linear Boltzmann equation of neutron transport theory and radiative transfer. ...

This monograph is devoted to the mathematical theory of discrete velocity models. Since this is a rather popular subject at this moment, a survey of the contributions to this subject is welcome, especially because it deals extensively with papers of Soviet authors.

In this book an attempt is made to trace, in simple models, the connection between the kinetic Boltzmann equation and the equations of mechanics of a continuum. The global theorem of existence and uniqueness is proved for a certain class of discrete equations, the meaning of the difference of two solutions for a symmetric nonlinear system describing a model of a continuum is defined. Analysed is the structure of shock waves by means of a kinetic model and the corresponding model of Navier-Stokes equations and provided is mathematical justification of the splitting method for some discrete nonlinear models.

This monograph considers problems of modelling, identification and optimisation of the processes of heat transfer and charge carriers in distributed objects of metallurgical heat technology and semiconductor micro-electronics. Results are presented on the use of the concept of concentrated capacity in studies of heat exchange processes in a burden-metal system under induction welding of rigid alloys, operating regimes of powerful super-high-frequency field transistors, heat regimes of the activation annealing of semiconductor plates, and switching processes of an injection logical element of an invertor.

I am glad that your university is named after the legendary, world-renowned scientist, academician Umirzak Makhmutovich Sultangazin. Umirzak Makhmutovich is one of the world-renowned academicians of Kazakhstan. He has lectured and served in the United States, the United Kingdom, France, Japan and other countries. He founded the schools of science. That is why we are proud of him. In mathematics, scientists are numbered according to their work, first and second. The first was a letter from Jacques-Louis Lions, a world-renowned scientist and president of the French Academy of Sciences, praising his work. Jacques Lions writes: "I appreciate your scientific work. I still remember reading your classic Boltzmann equations with great interest. I will never forget meeting you in Novosibirsk, Moscow and Paris and listening to your lectures with interest. On behalf of all French colleagues at the French Academy, I extend my heartfelt greetings."

Our state should trust its scientists more ... we must work so that we are not ashamed of the country that we will leave to our children and grandchildren.