Discrete Geometry and Topology (on the 100th Anniversary of the Death of Boris Nikolaevich Delone)

Boris Nikolaevich Delone (on his life and creative work) by D. K. Faddeev, N. P. Dolbilin, S. S. Ryshkov, and M. I. Shtogrin On variations of positive quadratic forms (with applications to the study of perfect forms) by M. M. Anzin Partitioning of Euclidean space into $L$-polytopes of some perfect lattices by E. P. Baranovskii Spanier-Whitehead duality and the stability of the intersection of compacta by A. N. Dranishnikov Combinatorial questions of the two-dimensional Ising model by N. P. Dolbilin, M. A. Shtanko, and M. I. Shtogrin Quadrillages and parametrizations of lattice cycles by N. P. Dolbilin, M. A. Shtanko, and M. I. Shtogrin On mappings of cubic manifolds into the standard lattice of Euclidean space by O. R. Karalashvili On the curvatures of tangent spheres by M. D. Kovalev On a nonregular partitioning of $n$-dimensional Lobachevsky space by congruent polytopes by V. S. Makarov On a geodesic on a Seifert-Weber manifold by V. S. Makarov and K. P. Makarova Projective Euclidean geometry and noncommutative probability theory by E. A. Morozova and N. N. Chentsov Three-dimensional spherical forms by M. M. Postnikov On the dissociation of point systems by S. S. Ryshkov, S. A. Chepanov, and N. N. Yakovlev Homology on presheaves of sets by K. A. Sitnikov and E. E. Skurikhin Dual systems of integer vectors and their application to the theory of $(0,1)$-matrices by S. S. Ryshkov and R. M. Erdal.