Results 21 to 30 of about 2,094,916 (148)
N = 2 supersymmetric sigma-models and duality [PDF]
, 2010 For two families of four-dimensional off-shell N = 2 supersymmetric nonlinear sigma-models constructed originally in projective superspace, we develop their formulation in terms of N = 1 chiral superfields.
A Galperin +50 more
core +2 more sources
Welfare and Output with Income Effects and Taste Shocks
, 2021 We provide a non-parametric characterization of how welfare responds to changes in budget and production possibility sets when preferences are non-homothetic or subject to shocks, in both partial and general equilibrium.
D. Baqaee, Ariel T. Burstein
semanticscholar +1 more source
Advanced Information Systems, 2019 The subject matter of the paper is the problem of optimal packing of spheres of different dimension into a container of arbitrary geometric shape. The goal is to construct a mathematical model which associates different statements of the problem.
G. Yaskov, S. Shekhovtsov
semanticscholar +1 more source
Conformal vector fields on f-cosymplectic manifolds
Filomat, 2023 In this paper, at first we characterize f-cosymplectic manifolds admitting conformal vector fields. Next, we establish that if a 3-dimensional f -cosymplectic manifold admits a homothetic vector field V, then either the manifold is of constant ...
Arpan Sardar, U. De, Y. Suh
semanticscholar +1 more source
ON D-HOMOTHETIC DEFORMATION OF TRANS-SASAKIAN STRUCTURE
, 2008 Abs t rac t . The object of the present paper is to study a transformation called Dhomothetic deformation of trans-Sasakian structure. Among others it is shown that in a trans-Sasakian manifold, the Ricci operator Q does not commute with the structure ...
A. Shaikh, K. Baishya, S. Eyasmin
semanticscholar +2 more sources
Wave-like Solutions for Bianchi type-I cosmologies in 5D [PDF]
, 2008 We derive exact solutions to the vacuum Einstein field equations in 5D, under the assumption that (i) the line element in 5D possesses self-similar symmetry, in the classical understanding of Sedov, Taub and Zeldovich, and that (ii) the metric tensor is ...
Apostolopoulos P S +17 more
core +2 more sources
Topology of the ambient boundary and the convergence of causal curves [PDF]
, 2015 We discuss the topological nature of the boundary spacetime, the conformal infinity of the ambient cosmological metric. Due to the existence of a homothetic group, the bounding spacetime must be equipped not with the usual Euclidean metric topology but ...
Antoniadis, Ignatios, Cotsakis, Spiros
core +2 more sources
Self-similar cosmologies in 5D: spatially flat anisotropic models
, 2008 In the context of theories of Kaluza-Klein type, with a large extra dimension, we study self-similar cosmological models in 5D that are homogeneous, anisotropic and spatially flat.
Horowitz G. T. +6 more
core +3 more sources
Geometric aspects of transversal Killing spinors on Riemannian flows [PDF]
, 2008 We study a Killing spinor type equation on spin Riemannian flows. We prove integrability conditions and partially classify those Riemannian flows $M$ carrying non-trivial solutions to that equation in case $M$ is a local Riemannian product, a Sasakian ...
Ginoux, Nicolas, Habib, Georges
core +9 more sources
New Symbolic Tools for Differential Geometry, Gravitation, and Field Theory [PDF]
, 2011 DifferentialGeometry is a Maple software package which symbolically performs fundamental operations of calculus on manifolds, differential geometry, tensor calculus, Lie algebras, Lie groups, transformation groups, jet spaces, and the variational ...
Acvevedo M. +5 more
core +4 more sources