Algebra i Analiz
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 Expository Surveys The two-dimensional Schrödinger operator with a homogeneous magnetic field and its perturbations by periodic zero-range potentialsV. A. Geiler 1 Research Papers Decreasing solutions and dispersion laws in a $(2+1)$-dimensional dressing methodL. V. Bogdanov, V. E. Zakharov 49 Representation of $C^*$-algebras generated by pseudodifferential operators in a polyhedronA. Yu. Kokotov 57 The Schoenberg problem on positive-definite functionsA. L. Koldobskii 78 Classification of irreducible orthogonal decompositions of simple Lie algebras of type $A_n$A. I. Kostrikin, Pham Huu Tiep 86 Isometric and contractive operators in Kreǐn spacesManfred Möller 110 Identity components of restrictions of a representation of a finite grouS. P. Strunkov 127 On defects of valued division algebrasI. L. Tomchin, V. I. Yanchevskii 147 Class field theory of multidimensional local fields of characteristic 0 with residue field of positive characteristicI. B. Fesenko 165 The algebra $\mathrm{Vert}(\mathbb C\mathrm{vir},c)$ of vertex operators for the Virasoro algebraD. V. Yur'ev 197 Yu. V Linnik. Some of his work from the 1950sI. A. Ibragimov 206 Book Reviews J. William Helton. “Operator Theory, Analytic Functions, Matrices, and Electrical Engineering”. CBMS Regional Conf. Series in Math. N 68. American Math. Society, 1987. 134 p.; Bruce A. Francis “A Course in $H^{\infty}$ Control Theory”. Lecture Notes in Control and Information Sciences. Vol. 88. Springer, 1987. 156 p.A. L. Vol'berg 216