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A. N. Kuvshinova, B. V. Loginov

**Cayley-Hamilton theorem for two variants of matrix spectral problems on E.Shmidt and development of characteristic polynomial.**7—20

I. V. Boikov, V. A. Ryazantsev

**Approximation methods for simultaneous reconstruction of shape and density of the body in the inverse potential problem.**21—31

### In Middle Volga Mathematical Society

D. V. Berzina, S. A. Mustafina

**The mathematical model of the process of dehydrogenation of methylbutanol in isoprene taking into account deactivation of the catalyst.**32—35

E. Ya. Gurevich, E.D. Kurenkov.

**On topological classification of Morse-Smale flows on surfaces by means of Lyapunov function**36—40

O. Y. Zabeivorota, I. M. Gubaidullin

**Analysis of mathematical models for the calculation of geomechanical drilling parameters**41—44

45—48

A. F. Zubova, V. I. Zubov, I. V. Zubov, S. A. Strecopitov

**The method of bring third measures quadrate systems from one equation of second order**49—56

V. E. Kruglov, O. V. Pochinka

**Energy function as a complete topological invariant for gradient-like cascades on surfaces**57—61

O. A. Kuzenkov, E. A. Ryabova

**Generalization of the behavior selection model in socio-economic systems**62—71

72—76

87—93

### Short Communications

A. V. Zubov , A. F. Zubova , M. V. Strecopitova

**The methods of building convex multitudes of coefficients stability polynom**94—97