scispace - formally typeset
A

A. A. Borisenko

Researcher at National Academy of Sciences of Ukraine

Publications -  49
Citations -  209

A. A. Borisenko is an academic researcher from National Academy of Sciences of Ukraine. The author has contributed to research in topics: Curvature & Hypersurface. The author has an hindex of 8, co-authored 48 publications receiving 153 citations. Previous affiliations of A. A. Borisenko include Sumy State University & University of Kharkiv.

Papers
More filters
Journal ArticleDOI

Prevalence and risk factors of post-COVID-19 condition in adults and children at 6 and 12 months after hospital discharge: a prospective, cohort study in Moscow (StopCOVID)

E.M. Pazukhina, +136 more
- 06 Jul 2022 - 
TL;DR: In this article , the authors investigated prevalence of post-COVID-19 condition (PCC) at 6-and 12-months follow-up, amongst previously hospitalised adults and children and assessed risk factors.
Journal ArticleDOI

COMPLETE $ l$-DIMENSIONAL SURFACES OF NONPOSITIVE EXTRINSIC CURVATURE IN A RIEMANNIAN SPACE

TL;DR: In this paper, the authors studied complete -dimensional surfaces of non-positive extrinsic 2-dimensional sectional curvature in Euclidean space, in the sphere, in the complex projective space, and in a Riemannian space.
Journal ArticleDOI

Isoperimetric inequality for curves with curvature bounded below

TL;DR: For embedded closed curves with curvature bounded below, this article proved an isoperimetric inequality estimating the minimal area bounded by such curves for a fixed perimeter, where the curvature of the embedded closed curve is a function of the radius of the curve.
Journal ArticleDOI

Closeness to spheres of hypersurfaces with normal curvature bounded below

TL;DR: For a Riemannian manifold M{sup n+1} and a compact domain bounded by a hypersurface ∂Ω with normal curvature bounded below, estimates in terms of the distance from O to ∂ ∩ for the angle between the geodesic line joining a fixed interior point O in Ω to a point on ∂ Ω and the outward normal to the surface were obtained in this paper.