Results 91 to 100 of about 640,865 (266)

A torsion theory in the category of cocommutative Hopf algebras

, 2015
The purpose of this article is to prove that the category of cocommutative Hopf $K$-algebras, over a field $K$ of characteristic zero, is a semi-abelian category.
Gran, Marino, Kadjo, Gabriel, Vercruysse, Joost   +2 more
core   +1 more source

Shear force and torsion in reinforced concrete beam elements: theoretical analysis based on Brazilian Standard Code ABNT NBR 6118:2007

Revista IBRACON de Estruturas e Materiais
Reinforced concrete beam elements are submitted to applicable loads along their life cycle that cause shear and torsion. These elements may be subject to only shear, pure torsion or both, torsion and shear combined.
R. Barros, J.S. Giongo
doaj   +1 more source

Duality equations on a 4-manifold of conformal torsion-free connection and some of their solutions for the zero signature

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019
On a 4-manifold of conformal torsion-free connection with zero signature (--++) we found conditions under which the conformal curvature matrix is dual (self-dual or anti-self-dual).
Leonid Nikolaevich Krivonosov, Vyacheslav Anatolievich Lukyanov   +1 more
doaj   +1 more source

The Spectral Action for Dirac Operators with skew-symmetric Torsion

, 2010
We derive a formula for the gravitational part of the spectral action for Dirac operators on 4-dimensional manifolds with totally anti-symmetric torsion.
A. Chamseddine, A. Chamseddine, A. Chamseddine, A. Chamseddine, A. Chamseddine, A. Chamseddine, A. Connes, A. Connes, A. Connes, A. Perez, B. Iochum, Christoph A. Stephan, Florian Hanisch, Frank Pfäffle, G. Cognola, G. Grensing, I. Agricola, I.L. Buchbinder, P.B. Gilkey, R. Nest, S. Alexander, S. Mercuri, W. Kalau, W.H. Goldthorpe, Yu.N. Obukhov   +24 more
core   +1 more source

Three-dimensional Newtonian gravity with cosmological constant and torsion [PDF]

, 2023
Patrick Concha, Evelyn Rodríguez, Gustavo Rubio, Paola Yañez   +3 more
openalex   +1 more source

Torsion and the Gravity Dual of Parity Symmetry Breaking in AdS4/CFT3 Holography

, 2008
We study four dimensional gravity with a negative cosmological constant deformed by the Nieh-Yan torsional topological invariant with a spacetime-dependent coefficient.
, Anastasios C Petkou, C.P. Herzog, D. Minic, D.S. Mansi, D.S. Mansi, E. Keski-Vakkuri, E. Witten, F. Canfora, J. Bagger, J.L. Davis, K. Hosomichi, M. Tinkham, Nam Nguyen Hoang, O. Aharony, O. Chandía, P. Basu, R. Jackiw, R.G. Leigh, R.G. Leigh, Robert G Leigh, S. de Haro, S. de Haro, S.S. Gubser, T. Albash   +24 more
core   +1 more source

Discrete torsion [PDF]

Physical Review D, 2003
In this article we explain discrete torsion. Put simply, discrete torsion is the choice of orbifold group action on the B field. We derive the classification H^2(G, U(1)), we derive the twisted sector phases appearing in string loop partition functions, we derive M.
openaire   +2 more sources

Determination of Femoral Neck Angle and Torsion Angle Utilizing a Novel Three-Dimensional Modeling and Analytical Technology Based on CT Datasets

PLoS ONE, 2016
Introduction Exact knowledge of femoral neck inclination and torsion angles is important in recognizing, understanding and treating pathologic conditions in the hip joint.
M. Hartel, A. Petersik, Anne Schmidt, D. Kendoff, J. Nüchtern, J. Rueger, W. Lehmann, L. Großterlinden   +7 more
semanticscholar   +1 more source

Torsion classes, wide subcategories and localisations [PDF]

, 2015
For a finite‐dimensional algebra A , we establish correspondences between torsion classes and wide subcategories in mod(A) . In case A is representation finite, we obtain an explicit bijection between these two classes of subcategories.
F. Marks, J. Šťovíček
semanticscholar   +1 more source

Bending, torsion and asymptotic analysis of the cantilever bar

Инженерно-строительный журнал, 2014
The paper estimates deformation of elastic, statically determinate cantilever truss of the large internal volume which is subjected to bending and torsional loads for an arbitrary number of structure zones.
M.N. Kirsanov
doaj   +1 more source