Results 121 to 130 of about 2,503,918 (387)
Enumerative aspects of the Gross-Siebert program [PDF]
, 2014 We present enumerative aspects of the Gross-Siebert program in this introductory survey. After sketching the program's main themes and goals, we review the basic definitions and results of logarithmic and tropical geometry.
A. Gathmann +28 more
core +2 more sources
Metric-Affine Geometries with Spherical Symmetry [PDF]
Symmetry, 2020 We provide a comprehensive overview of metric-affine geometries with spherical symmetry, which may be used in order to solve the field equations for generic gravity theories which employ these geometries as their field variables. We discuss the most general class of such geometries, which we display both in the metric-Palatini formulation and in the ...
openaire +3 more sources
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Volumetric‐modulated arc therapy (VMAT) treatment planning allows a compromise between a sufficient coverage of the planning target volume (PTV) and a simultaneous sparing of organs‐at‐risk (OARs). Particularly in the case of lung tumors, deciding whether it is possible or worth spending more time on further improvements of a treatment
Johann Brand +4 more
wiley +1 more source
Symmetries and conformal bridge in Schwarschild-(A)dS black hole mechanics
Journal of High Energy Physics, 2021 We show that the Schwarzschild-(A)dS black hole mechanics possesses a hidden symmetry under the three-dimensional Poincaré group. This symmetry shows up after having gauge-fixed the diffeomorphism invariance in the symmetry-reduced homogeneous Einstein-Λ
Jibril Ben Achour, Etera R. Livine
doaj +1 more source
Tetrad gravity, electroweak geometry and conformal symmetry
, 2010 A partly original description of gauge fields and electroweak geometry is proposed. A discussion of the breaking of conformal symmetry and the nature of the dilaton in the proposed setting indicates that such questions cannot be definitely answered in ...
Canarutto D. +9 more
core +1 more source
Toeplitz Operators, K\"ahler Manifolds, and Line Bundles [PDF]
, 2007 This is a survey paper. We discuss Toeplitz operators in K\"ahler geometry, with applications to geometric quantization, and review some recent developments.Comment: This is a contribution to the Proceedings of the 2007 Midwest Geometry Conference in ...
Foth, Tatyana
core +3 more sources
Controlling transport of underdamped particles in two-dimensional driven Bravais lattices
Physical Review Research, 2020 We demonstrate the directed transport of underdamped particles in two-dimensional lattices of arbitrary geometry driven by an unbiased AC driving force.
Aritra K. Mukhopadhyay, Peter Schmelcher
doaj +1 more source
Quantum gauge symmetries in noncommutative geometry
Journal of Noncommutative Geometry, 2014 We discuss generalizations of the notion of i) the group of unitary elements of a (real or complex) finite-dimensional C*-algebra, ii) gauge transformations and iii) (real) automorphisms in the framework of compact quantum group theory and spectral triples.
Bhowmick, J. +3 more
openaire +6 more sources
Parabolic Symmetric Spaces [PDF]
Annals of Global Analysis and Geometry, Vol. 37, Issue 2,2010,
125-141, 2009 We study here systems of symmetries on $|1|$--graded parabolic geometries. We are interested in smooth systems of symmetries and we discuss non--flat homogeneous $|1|$--graded geometries. We show the existence of an invariant admissible affine connection under quite weak condition on the system.
arxiv +1 more source
Einstein-Riemann Gravity on Deformed Spaces [PDF]
, 2006 A differential calculus, differential geometry and the E-R Gravity theory are studied on noncommutative spaces. Noncommutativity is formulated in the star product formalism. The basis for the gravity theory is the infinitesimal algebra of diffeomorphisms.
Wess, Julius
core +4 more sources