Results 41 to 50 of about 22,228 (202)

A Short Survey of Noncommutative Geometry

, 2000
We give a survey of selected topics in noncommutative geometry, with some emphasis on those directly related to physics, including our recent work with Dirk Kreimer on renormalization and the Riemann-Hilbert problem. We discuss at length two issues.
Alain Connes, Atiyah M. F., Atiyah M. F., Baum P., Broadhurst D. J., Brown L. G., Burghelea D., Chamseddine A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Connes A., Cuntz J., Cuntz J., Cuntz J., Haagerup U., Hilsum M., Jaffe A., Julg P., Kalau W., Kasparov G. G., Kasparov G. G., Kontsevich M., Kreimer D., Kreimer D., Kreimer D., Kreimer D., Krieger W., Pimsner M., Rieffel M. A., Rieffel M. A., Singer I. M., Skandalis G., Takesaki M., Tsygan B. L., van Ritbergen T., Varilly J. C.   +46 more
core   +2 more sources

Generalized Jordan N-Derivations of Unital Algebras with Idempotents

Journal of Mathematics, 2021
Let A be a unital algebra with idempotent e over a 2-torsionfree unital commutative ring ℛ and S:A⟶A be an arbitrary generalized Jordan n-derivation associated with a Jordan n-derivation J.
Xinfeng Liang
doaj   +1 more source

Intraday Functional PCA Forecasting of Cryptocurrency Returns

Journal of Forecasting, EarlyView.
ABSTRACT We study the functional PCA (FPCA) forecasting method in application to functions of intraday returns on Bitcoin. We show that improved interval forecasts of future return functions are obtained when the conditional heteroscedasticity of return functions is taken into account.
Joann Jasiak, Cheng Zhong
wiley   +1 more source

A complete closed-form solution to a tropical extremal problem [PDF]

, 2012
A multidimensional extremal problem in the idempotent algebra setting is considered which consists in minimizing a nonlinear functional defined on a finite-dimensional semimodule over an idempotent semifield.
Krivulin, Nikolai
core  

Self-adjoint symmetry operators connected with the magnetic Heisenberg ring

, 2009
We consider symmetry operators a from the group ring C[S_N] which act on the Hilbert space H of the 1D spin-1/2 Heisenberg magnetic ring with N sites. We investigate such symmetry operators a which are self-adjoint (in a sence defined in the paper) and ...
Bernd Fiedler, Boerner H, Boerner H, Clausen M, Fiedler B, Fiedler B, Fiedler B, Fiedler B, Fiedler B, Fiedler B, Fulling S A, Gordon D J, Jakubczyk D, Jakubczyk P, Jakubczyk P, Karbach M, Karbach M, Kerber A, Weyl H, Weyl H   +19 more
core   +1 more source

Band‐Pass Filtering With High‐Dimensional Time Series. A Synthetic Indicator of the Medium‐to‐Long Run Component of Growth

Journal of Time Series Analysis, EarlyView.
ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli, Marco Lippi, Tommaso Proietti   +2 more
wiley   +1 more source

Some Results on Generalized Inverse of Intuitionistic Fuzzy Matrices

Fuzzy Information and Engineering, 2014
In this paper, pseudo-similar intuitionistic fuzzy matrix (IFM) is defined with some properties of pseudo-similar and semi-similar IFMs studied. Here it is shown that, the pseudo-similarity relation preserve idempotency and regularity for the IFMs. After
R. Pradhan, M. Pal
doaj   +1 more source

Study of K- Idempotent Fuzzy Matrix

INTERNATIONAL JOURNAL OF HUMANITIES, ENGINEERING, SCIENCE AND MANAGEMENT, 2022
In this paper, we introduce and investigate the concept of k - Idempotent fuzzy matrix as a generalisation of Idempotent fuzzy matrix via permutations in this paper.  
openaire   +1 more source

On the Q‐Polynomial Property of Bipartite Graphs Admitting a Uniform Structure

Journal of Combinatorial Designs, Volume 34, Issue 2, Page 69-86, February 2026.
ABSTRACT Let Γ denote a finite, connected graph with vertex set X. Fix x ∈ X and let ε ≥ 3 denote the eccentricity of x. For mutually distinct scalars { θ i * } i = 0 ε define a diagonal matrix A * = A * ( θ 0 * , θ 1 * , … , θ ε * ) ∈ Mat X ( R ) as follows: for y ∈ X we let ( A * ) y y = θ ∂ ( x , y ) *, where ∂ denotes the shortest path length ...
Blas Fernández, Roghayeh Maleki, Štefko Miklavič, Giusy Monzillo   +3 more
wiley   +1 more source

Chimera state in coupled map lattice of matrices

Lietuvos Matematikos Rinkinys, 2021
In recent years, a lot of research has focused on understanding the behavior of when synchronous and asynchronous phases occur, that is, the existence of chimera states in various networks.
Kotryna Mačernytė, Rasa Šmidtaitė
doaj   +1 more source