Results 21 to 30 of about 202,952 (194)

Structure of Finite-Dimensional Protori

Axioms, 2019
A Structure Theorem for Protori is derived for the category of finite-dimensional protori (compact connected abelian groups), which details the interplay between the properties of density, discreteness, torsion, and divisibility within a finite ...
Wayne Lewis
doaj   +1 more source

An entropic characterization of the flat metrics on the two torus [PDF]

, 2014
The geodesic flow of the flat metric on a torus is minimizing the polynomial entropy among all geodesic flows on this torus.
Bernard, Patrick, Labrousse, Clémence
core   +3 more sources

A CASE STUDY OF MODELING A TORUS IN DIFFERENT MODELING SOFTWARES

Journal of Industrial Design and Engineering Graphics, 2021
Modeling of the complex geometric shapes requires the use of appropriate softwares. This study analyzes the process of modeling with two different computer softwares, AutoCAD and Rhinoceros.
Milica Veljkovic, Sonja Krasic, Peter Pejic, Zlata Tosic   +3 more
doaj   +2 more sources

Generalized Fuzzy Torus and its Modular Properties [PDF]

, 2013
We consider a generalization of the basic fuzzy torus to a fuzzy torus with non-trivial modular parameter, based on a finite matrix algebra. We discuss the modular properties of this fuzzy torus, and compute the matrix Laplacian for a scalar field.
Schreivogl, Paul, Steinacker, Harold
core   +5 more sources

Line emission from gamma-ray burst environments [PDF]

, 1999
The time and angle dependent line and continuum emission from a dense torus around a cosmological gamma-ray burst source is simulated, taking into account photoionization, collisional ionization, recombination, and electron heating and cooling due to ...
Aldrovandi S. M. V., Bottcher M., Bottcher M., Holland S., Kaastra J. S., Markus Bottcher, Piro L., Rees M. J., Seaton M. J.   +8 more
core   +2 more sources

Topological classification of torus manifolds which have codimension one extended actions [PDF]

, 2010
A toric manifold is a compact non-singular toric variety equipped with a natural half-dimensional compact torus action. A torus manifold is an oriented, closed, smooth manifold of dimension $2n$ with an effective action of a compact torus $T^{n}$ having ...
Choi, Hattori, Husemoller, Kuroki, Kuroki, Masuda, Masuda, Mimura, Panov, Shintarô Kuroki, Suyoung Choi   +10 more
core   +1 more source

Dusty Structure Around Type-I Active Galactic Nuclei: Clumpy Torus Narrow Line Region and Near-Nucleus Hot Dust [PDF]

, 2009
We fitted Spitzer/IRS ~2-35 um spectra of 26 luminous QSOs in attempt to define the main emission components. Our model has three major components: a clumpy torus, dusty narrow line region (NLR) clouds and a blackbody-like dust.
Abazajian, Antonucci, Bennert, Bock, Draine, Efstathiou, Elitzur, Gavazzi, Glikman, Granato, Grasdalen, Guyon, Guyon, Hagai Netzer, Hyland, Imanishi, Jarrett, Jarrett, Lauer, Lawrence, Mason, Matsuoka, Mentuch, Minezaki, Moshe Elitzur, Nenkova, Nenkova, Nenkova, Netzer, Netzer, Netzer, Netzer, Netzer, Netzer, Ossenkopf, Packham, Radomski, Richards, Riffel, Rivay Mor, Rowan-Robinson, Schmitt, Schweitzer, Schweitzer, Scoville, Sirocky, Soifer, Sturm, Sturm, Suganuma, Surace, Surace, Teplitz, Thompson, Tomono, Treister, Treister, Veilleux, Wang, York   +59 more
core   +3 more sources

Torus Computed Tomography [PDF]

SIAM Journal on Applied Mathematics, 2020
We present a new computed tomography (CT) method for inverting the Radon transform in 2D. The idea relies on the geometry of the flat torus, hence we call the new method Torus CT. We prove new inversion formulas for integrable functions, solve a minimization problem associated to Tikhonov regularization in Sobolev spaces and prove that the solution ...
Koskela, Olli, Railo, Jesse, Ilmavirta, Joonas   +3 more
openaire   +5 more sources

Magnetic translation groups in an n-dimensional torus [PDF]

, 2002
A charged particle in a uniform magnetic field in a two-dimensional torus has a discrete noncommutative translation symmetry instead of a continuous commutative translation symmetry.
Antoniadis I., Asch J., Ashby N., Avron J., Avron J. E., Connes A., Dubrovin B. A., Florek W., Fradkin E., Gruber M. J., Hatanaka H., Jackiw R., Kuwabara R., Kuwabara R., Kuwabara R., Lipinski D., Lulek T., Matsumoto S., Novikov S. P., Ohnishi K., Sakamoto M., Sakamoto M., Sakamoto M., Sakamoto M., Shogo Tanimura, Walcerz S.   +25 more
core   +6 more sources

Model of 5R Spatial Linkage in the Geometry of Tori

International Journal of Applied Mechanics and Engineering, 2014
The present study covers the problem of a kinematic analysis of a spatial 5R single DOF linkage. This mechanism was constructed by combining two 4R universal mechanisms presented in tori geometry (Bil, 2012). The problem can be presented as the effect of
T. Bil, Z. Budniak
doaj   +1 more source