Mat. Zametki, 2009, Volume 86, Issue 1

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2009, Volume 86, Issue 1

	A Formal Frobenius Theorem and Argument Shift A. V. Bolsinov, K. M. Zuev	3
	Classification of Ryser Graphs A. L. Gavrilyuk	14
	Automorphisms of Coverings of Strongly Regular Graphs with Parameters (81,20,1,6) Guo Wenbin, A. A. Makhnev, D. V. Paduchikh	22
	Reduction of a Nonstationary Euler Hydrodynamic Equation to a System of Ordinary Differential Equations in the Plane Problem of Cavitational Flow with Boundary Control A. S. Demidov	37
	The Behavior of Bounded Solutions of Quasilinear Elliptic Equations on Manifolds A. B. Ivanov	51
	Orthogonal Subsets of Classical Root Systems and Coadjoint Orbits of Unipotent Groups M. V. Ignat'ev	65
	Padé–Faber Approximation of Markov Functions on Real-Symmetric Compact Sets L. A. Knizhnerman	81
	On the Distribution of Zeros of Functions from Weighted Bergman Spaces E. A. Sevast'yanov, A. A. Dolgoborodov	95
	Approximation of Coincidence Points and Common Fixed Points of a Collection of Mappings of Metric Spaces T. N. Fomenko	110
	On the Geometry of Locally Conformally Almost Cosymplectic Manifolds S. V. Kharitonova	126
	On the Number of $A$-Mappings A. L. Yakymiv	139

Brief Communications
	Brauer–Siegel Theorem for Families of Elliptic Surfaces over Finite Fields A. I. Zykin	148
	Analog of the Levitzki Theorem for Infinitely Generated Associative Algebras L. M. Samoilov	151
	Exact Values of Information Kolmogorov Widths of Sobolev Classes in the One-Dimensional Case E. M. Skorikov	154