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We compute the cohomology of the right generalised projective Stiefel manifolds and use it to find bounds on the rank of the complementary bundle for certain vector bundles. Further the cohomology computations are also used to find bounds…

Algebraic Topology · Mathematics 2019-08-15 Samik Basu , B. Subhash

We use the language of von Neumann subfactors to investigate non-invertible symmetries in two dimensions. A fusion categorical symmetry $\mathcal{C}$, its module category $\mathcal{M}$, and a gauging labeled by an algebra object…

High Energy Physics - Theory · Physics 2025-12-17 Xingyang Yu , Hao Y. Zhang

We compute tautological integrals over Quot schemes on curves and surfaces. After obtaining several explicit formulas over Quot schemes of dimension 0 quotients on curves (and finding a new symmetry), we apply the results to tautological…

Algebraic Geometry · Mathematics 2022-02-02 Dragos Oprea , Rahul Pandharipande

We elaborate on nonassociative differential geometry of phase spaces endowed with nonholonomic (non-integrable) distributions and frames, nonlinear and linear connections, symmetric and nonsymmetric metrics, and correspondingly adapted…

General Physics · Physics 2025-06-23 Sergiu I. Vacaru , Elşen Veli Veliev , Laurenţiu Bubuianu

Real-world data usually have high dimensionality and it is important to mitigate the curse of dimensionality. High-dimensional data are usually in a coherent structure and make the data in relatively small true degrees of freedom. There are…

Machine Learning · Computer Science 2021-03-12 Xiang Wang , Xiaoyong Li , Junxing Zhu , Zichen Xu , Kaijun Ren , Weiming Zhang , Xinwang Liu , Kui Yu

We investigate domain wall junctions in a generalized Wess-Zumino model with a Z(N) symmetry. We present a method to identify the junctions which are potentially BPS saturated. We then use a numerical simulation to show that those junctions…

High Energy Physics - Theory · Physics 2009-10-31 D. Binosi , T. ter Veldhuis

We study the curvature-dimension inequality in regular graphs. We develop techniques for calculating the curvature of such graphs, and we give characterizations of classes of graphs with positive, zero, and negative curvature. Our main…

Combinatorics · Mathematics 2017-01-31 Peter Ralli

A world-volume model of non-critical 3-brane is quantized in a strong coupling phase where fluctuations of the conformal mode become dominant. This phase, called the conformal-mode dominant phase, is realized at the very high energy far…

High Energy Physics - Theory · Physics 2009-11-10 Ken-ji Hamada , Shinichi Horata

Computing the cohomology of the tensor product of two vector bundles is central in the study of their moduli spaces and in applications to representation theory, combinatorics and physics. These computations play a fundamental role in the…

Algebraic Geometry · Mathematics 2021-08-25 Izzet Coskun , Jack Huizenga , John Kopper

This paper deals with computing topological invariants such as connected components, boundary surface genus, and homology groups. For each input data set, we have designed or implemented algorithms to calculate connected components,…

Computer Vision and Pattern Recognition · Computer Science 2009-12-31 Li Chen

We present a methodology for detecting non-linearities in data sets based on the characterization of the structural features of the Fourier phase maps. A Fourier phase map is a 2D set of points $M= \{(\phi_{\vec{k}}, \phi_{\vec{k} +…

Data Analysis, Statistics and Probability · Physics 2007-05-23 Roberto A. Monetti , Wolfram Bunk , Ferdinand Jamitzky , Christoph Raeth , Gregor Morfill

We analyze topological boundary conditions and topological surface defects in three-dimensional topological field theories of Reshetikhin-Turaev type based on arbitrary modular tensor categories. Boundary conditions are described by central…

High Energy Physics - Theory · Physics 2015-06-04 Jurgen Fuchs , Christoph Schweigert , Alessandro Valentino

We study symmetries and defects of a wide class of two dimensional Abelian topological phases characterized by Lie algebras. We formulate the symmetry group of all Abelian topological field theories. The symmetries relabel quasiparticles…

Strongly Correlated Electrons · Physics 2015-01-30 Mayukh Nilay Khan , Jeffrey C. Y. Teo , Taylor L. Hughes

In this work, we propose an extension of the mixed Virtual Element Method (VEM) for bi-dimensional computational grids with curvilinear edge elements. The approximation by means of rectilinear edges of a domain with curvilinear geometrical…

Numerical Analysis · Mathematics 2021-09-01 Franco Dassi , Alessio Fumagalli , Davide Losapio , Stefano Scialò , Anna Scotti , Giuseppe Vacca

A general theory of topological classification of defects is introduced. We illustrate the application of tools from algebraic topology, including homotopy and cohomology groups, to classify defects including several explicit calculations…

Mathematical Physics · Physics 2021-06-15 Nivedita , Anurag Gupta

The study of topological band structures have sparked prominent research interest the past decade, culminating in the recent formulation of rather prolific classification schemes that encapsulate a large fraction of phases and features.…

Mesoscale and Nanoscale Physics · Physics 2021-05-21 Gunnar. F. Lange , Adrien Bouhon , Robert-Jan Slager

We demonstrate the semiclassical nature of symmetry twist defects that differ from quantum deconfined anyons in a true topological phase by examining non-abelian crystalline defects in an abelian lattice model. An underlying non-dynamical…

Strongly Correlated Electrons · Physics 2014-09-30 Jeffrey C. Y. Teo , Abhishek Roy , Xiao Chen

Advances in imaging techniques enable high resolution 3D visualisation of vascular networks over time and reveal abnormal structural features such as twists and loops, and their quantification is an active area of research. Here we showcase…

We classify $n$-dimensional geometric graph manifolds with nonnegative scalar curvature, and first show that if $n>3$, the universal cover splits off a codimension 3 Euclidean factor. We then proceed with the classification of the…

Differential Geometry · Mathematics 2021-09-17 Luis Florit , Wolfgang Ziller

We devise and analyze hybrid polyhedral methods of arbitrary order for the approximation of div-curl systems on three-dimensional domains featuring non-trivial topology. The div-curl systems we are interested in stem from magnetostatics,…

Numerical Analysis · Mathematics 2025-06-25 Jérémy Dalphin , Jean-Pierre Ducreux , Simon Lemaire , Silvano Pitassi