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A. R. Bikbaeva,V. N. Krizsky

**About the method of the solution problem of non-stationary diffusion of radon in piecewise and anisotropic media**8—11

V. Z. Grines, S. H. Kapkaeva

**On classification of gradient-like diffeomorphisms on surfaces by means automorphisms of three-color graphs.**12—22

23—26

### In Middle Volga Mathematical Society

55—58

V. F. Masyagin, R. V. Zhalnin, V. F. Tishkin

**Discontinuous finite-element Galerkin method for numerical solution of two-dimensional diffusion problems on unstructured grids**59—65

66—69

V. A. Vorob'ev, Yu. V. Berezovska , A. Yu. Kochnev

**The population of automata is a model of the complex systems**66—69

L. Sayfullina, R. Talipova, I. Gubaydullin,S. Spivak,B. Kutepov

**Mathematical modeling of catalytic activity of metallosilicate materials in the decomposition reaction of hydrogen peroxide**70—76

S. I. Spivak, A. S. Ismagilova, A. A. Akhmerov

**Software solutions of inverse problems of chemical kinetics**86—95

96—102

T. K. Yuldashev, K. H. Shabadikov

**Mixed value problem for nonlinear partial equation of higher order with time maxima**103—115

### Short Communications

119—122