Results 101 to 110 of about 161,488 (234)
Likelihood Estimation for Stochastic Differential Equations with Mixed Effects
Scandinavian Journal of Statistics, EarlyView.ABSTRACT Stochastic differential equations provide a powerful tool for modelling dynamic phenomena affected by random noise. When time series are observed for several experimental units, it is often the case that some of the parameters vary between the individual experimental units.
Fernando Baltazar‐Larios +2 more
wiley +1 more source
Nonclassical shock waves of conservation laws: Flux function having two inflection points
Electronic Journal of Differential Equations, 2006 We consider the Riemann problem for non-genuinely nonlinear conservation laws where the flux function admits two inflection points. This is a simplification of van der Waals fluid pressure, which can be seen as a function of the specific volume for a ...
Ho Dac Nghia, Mai Duc Thanh
doaj
The Huang–Yang Formula for the Low‐Density Fermi Gas: Upper Bound
Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1919-1972, August 2026.ABSTRACT We study the ground state energy of a gas of spin 1/2$1/2$ fermions with repulsive short‐range interactions. We derive an upper bound that agrees, at low density ϱ$\varrho$, with the Huang–Yang conjecture. The latter captures the first three terms in an asymptotic low‐density expansion, and in particular the Huang–Yang correction term of order
Emanuela L. Giacomelli +3 more
wiley +1 more source
Riemann problem for a two-dimensional quasilinear hyperbolic system
Electronic Journal of Differential Equations, 2015 This article concerns the study of the Riemann problem for a two-dimensional non-strictly hyperbolic system of conservation laws. The initial data are three constant states separated by three lines and are chosen so that one of the three interfaces ...
Chun Shen
doaj
Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic
Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1973-2102, August 2026.ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley +1 more source
The Revo‐Evo Debate in the History and Philosophy of Science
Natural Sciences, Volume 6, Issue 3, July 2026.The paper juxtaposes revolutionary and evolutionary positions in epistemology in general as well as the history of science. While it deems the evolutionary arguments more persuasive, it also stresses the dependence of our assessment of change on the language we choose to describe the theories and positions under consideration.
Yemima Ben‐Menahem
wiley +1 more source
, 2019 These lectures introduce the method of nonlinear steepest descent for Riemann-Hilbert problems. This method finds use in studying asymptotics associated to a variety of special functions such as the Painlevé equations and orthogonal polynomials, in solving the inverse scattering problem for certain integrable systems, and in proving universality for ...
openaire +2 more sources
Brain and Behavior, Volume 16, Issue 6, June 2026.Gut dysbiosis and sleep disturbances interact bidirectionally through microbial metabolites, immune activation, and neuroendocrine signaling along the gut–brain axis. Microbiome‐based interventions, including probiotics, prebiotics, synbiotics, postbiotics, and fecal microbiota transplantation, may help improve sleep quality and reduce inflammatory ...
Ghaleb Oriquat +8 more
wiley +1 more source
, 2013 In this article we investigate the century-old continuous extension problem of the Riemann map. Let $G$ be a simply connected domain. We call $λ$ in $\partial G$ a multiple point if there are simply connected subdomains $ U$ and $V$ such that $λ\in\partial U \cap\partial V$ and $ dist (\partial U\cap G , \partial V\cap G )>0$.
openaire +2 more sources
Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems
Energy Science &Engineering, Volume 14, Issue 6, Page 2785-2815, June 2026.This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk +4 more
wiley +1 more source