Results 91 to 100 of about 52,965 (200)

A Markov approach to credit rating migration conditional on economic states

Canadian Journal of Statistics, Volume 54, Issue 1, March 2026.
Abstract We develop a model for credit rating migration that accounts for the impact of economic state fluctuations on default probabilities. The joint process for the economic state and the rating is modelled as a time‐homogeneous Markov chain. While the rating process itself possesses the Markov property only under restrictive conditions, methods ...
Michael Kalkbrener, Natalie Packham
wiley   +1 more source

Uma leitura de Produções de Significados na constituição da noção de base em Álgebra Linear

Revista de Investigação e Divulgação em Educação Matemática, 2022
Neste artigo será apresentada uma leitura de processos de produção de significados a partir de registros de trabalhos de sujeitos históricos, reconhecidos como participantes da emergência de noções constitutivas do que atualmente é compreendido como base
Amarildo Melchiades da Silva, Janete Bolite Frant, Viviane Cristina Almada de Oliveira   +2 more
doaj  

Accurate Column Moist Static Energy Budget in Climate Models. Part 1: Conservation Equation Formulation, Methodology, and Primary Results Demonstrated Using GISS ModelE3

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 3, March 2026.
Abstract Column‐integrated moist static energy (MSE) budgets underpin theories of tropical convection and circulation, yet in reanalyses and climate models the budget rarely closes; residuals routinely match the leading terms and mask physical insights.
Kuniaki Inoue, Maxwell Kelley, Ann M. Fridlind, Michela Biasutti, Gregory S. Elsaesser   +4 more
wiley   +1 more source

Cointegrating Polynomial Regressions With Power Law Trends

Journal of Time Series Analysis, Volume 47, Issue 2, Page 331-344, March 2026.
ABSTRACT The common practice in cointegrating polynomial regressions (CPRs) often confines nonlinearities in the variable of interest to stochastic trends, thereby overlooking the possibility that they may be caused by deterministic components. As an extension, we propose univariate and multivariate CPRs that incorporate power law deterministic trends.
Yicong Lin, Hanno Reuvers
wiley   +1 more source

THE LEVI DECOMPOSITION OF THE LIE ALGEBRA M_2 (R)⋊gl_2 (R)

Barekeng
The idea of the Lie algebra  is studied in this research. The decomposition between Levi sub-algebra and the radical can be used to define the finite dimensional Lie algebra. The Levi decomposition is the name for this type of decomposition. The goal of
Edi Kurniadi, Henti Henti, Ema Carnia
doaj   +1 more source

A Frobenius formula for the structure coefficients of double-class algebras of Gelfand pairs

, 2015
We generalise some well known properties of irreducible characters of finite groups to zonal spherical functions of Gelfand pairs. This leads to a Frobenius formula for Gelfand pairs. For a given Gelfand pair, the structure coefficients of its associated
Tout, Omar
core  

Anomalies of non-invertible symmetries in (3+1)d

SciPost Physics
Anomalies of global symmetries are important tools for understanding the dynamics of quantum systems. We investigate anomalies of non-invertible symmetries in 3+1d using 4+1d bulk topological quantum field theories given by Abelian two-form gauge ...
Clay Córdova, Po-Shen Hsin, Carolyn Zhang
doaj   +1 more source

Frobenius–Schur Indicator for Categories with Duality

Axioms, 2012
We introduce the Frobenius–Schur indicator for categories with duality to give a category-theoretical understanding of various generalizations of the Frobenius–Schur theorem including that for semisimple quasi-Hopf algebras, weak Hopf C*-algebras and ...
Kenichi Shimizu
doaj   +1 more source

Convergence of random walks on double transitive group generated by its permutational character

Visnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2019
Let $P$ be a probability on a finite group $G$, $U(g)=\frac{1}{|G|}$ the uniform (trivial) probability on the group $G$, $P^{(n)}=P *\ldots*P$ an $n$-fold convolution of $P$.
Aleksandr L. Vyshnevetskiy
doaj   +1 more source

Non-invertible symmetries and LSM-type constraints on a tensor product Hilbert space

SciPost Physics
We discuss the exact non-invertible Kramers-Wannier symmetry of 1+1d lattice models on a tensor product Hilbert space of qubits. This symmetry is associated with a topological defect and a conserved operator, and the latter can be presented as a matrix ...
Nathan Seiberg, Sahand Seifnashri, Shu-Heng Shao
doaj   +1 more source