A Clinical Case of A Complicated Course of Influenza A/H3N2 Strain in the Epidemiological Season 2017-2018.

The article presents information on the course of influenza of H3N2 strain in a man aged 48 years, with complications in the late post-infectious period. A number of risk factors that led to this outcome of the disease are disclosed

Billiard Representation for Multidimensional Cosmology with Multicomponent Perfect Fluid near the Singularity

The multidimensional cosmological model describing the evolution of $n$ Einstein spaces in the presence of multicomponent perfect fluid is considered. When certain restrictions on the parameters of the model are imposed, the dynamics of the model near the singularity is reduced to a billiard on the $(n-1)$-dimensional Lobachevsky space $H^{n-1}$. The geometrical criterion for the finiteness of the billiard volume and its compactness is suggested. This criterion reduces the problem to the problem of illumination of $(n-2)$-dimensional sphere $S^{n-2}$ by point-like sources. Some generalization of the considered scheme (including scalar field and quantum generalizations) are considered.Comment: 16 pages, LaTex. 4 figures are available upon request (hard copy