Results 11 to 20 of about 191,077 (277)

Bianchi transformation of the pseudosphere

open access: yesДифференциальная геометрия многообразий фигур, 2023
The work is devoted to the study of the Bianchi transform for surfa­ces of constant negative Gaussian curvature. The surfaces of rotation of cons­tant negative Gaussian curvature are the Minding top, the Minding coil, the pseudosphere (Beltrami surface).
M. A. Cheshkova
doaj   +1 more source

On the geometry of Liouville foliations [PDF]

open access: yesE3S Web of Conferences, 2023
The paper studies the geometry of Liouville foliation generated by integrable Hamiltonian system. It is shown that regular leaves are two-dimensional surface of zero Gaussian curvature and zero Gaussian torsion.
Narmanov Abdigappar, Ergashova Shohida
doaj   +1 more source

Computational analysis of hygromorphic self-shaping wood gridshell structures [PDF]

open access: yesRoyal Society Open Science, 2020
Bi-layered composites capable of self-shaping are of increasing relevance to science and engineering. They can be made out of anisotropic materials that are responsive to changes in a state variable, e.g.
Philippe Grönquist   +5 more
doaj   +1 more source

Transformation of Bianchi for Minding Top

open access: yesДифференциальная геометрия многообразий фигур, 2021
The work is devoted to the study of the Bianchi transform for surfac­es of revolution of constant negative Gaussian curvature. The surfaces of rotation of constant negative Gaussian curvature are the Minding top, the Minding coil, the pseudosphere ...
M.A. Cheshkova
doaj   +1 more source

NORMALIZATION OF CLASSICAL HAMILTONIAN SYSTEMS WITH TWO DEGREES OF FREEDOM

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2020
The family of the Hamiltonian systems with two degrees of freedom was investigated. The calculations of the Poincaré sections show that with arbitrary values of the parameters of the Hamilton function, the system is non-integrable and dynamic chaos is ...
I.N. Belyaeva   +4 more
doaj   +1 more source

The Weighted Gaussian Curvature Derivative of a Space-Filling Diagram

open access: yesComputational and Mathematical Biophysics, 2020
The morphometric approach [11, 14] writes the solvation free energy as a linear combination of weighted versions of the volume, area, mean curvature, and Gaussian curvature of the space-filling diagram.
Akopyan Arsenyi, Edelsbrunner Herbert
doaj   +1 more source

Distinct cytoskeletal proteins define zones of enhanced cell wall synthesis in Helicobacter pylori

open access: yeseLife, 2020
Helical cell shape is necessary for efficient stomach colonization by Helicobacter pylori, but the molecular mechanisms for generating helical shape remain unclear. The helical centerline pitch and radius of wild-type H.
Jennifer A Taylor   +13 more
doaj   +1 more source

The longitudinal KAM-cocycle of a magnetic flow [PDF]

open access: yes, 2004
Let $M$ be a closed oriented surface of negative Gaussian curvature and let $\Omega$ be a non-exact 2-form. Let $\lambda$ be a small positive real number.
Paternain, Gabriel P.
core   +2 more sources

Modular Gaussian curvature [PDF]

open access: yes, 2019
We review the state of the art of our understanding of the conformal geometry of the irrational rotation algebra. This was sparked by a paper by Cohen and Connes. We review the more recent progress made by Connes and the second named author and the work of the authors of this review.
Lesch, Matthias, Moscovici, Henri
openaire   +2 more sources

Examples of surfaces of constant mean curvature

open access: yesДифференциальная геометрия многообразий фигур, 2019
A surface in E3 is called parallel to the surface M if it consists of the ends of constant length segments, laid on the normals to the surfaces at points of this surface. The tangent planes at the corresponding points will be parallel.
M. A. Cheshkova
doaj   +1 more source

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