Results 131 to 140 of about 71,800 (235)
On the Disentanglement of an Economic Union
Journal of Regional Science, Volume 66, Issue 1, Page 244-269, January 2026.ABSTRACT We study how the unilateral withdrawal of a region from an economic union affects the spatial distribution of economic activity and social welfare. We explore a three‐region economic geography model under the assumption that this withdrawal can be expressed as a higher transportation cost between the leaving party and the remaining union ...
Jorge Saraiva +2 more
wiley +1 more source
Indecomposable positive maps on positive semidefinite matrices from Mn to Mn+1 [PDF]
, 2021 WINDA CHARLES AKATCH +2 more
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Robust Λ$\Lambda$‐Quantiles and Extremal Distributions
Mathematical Finance, Volume 36, Issue 1, Page 3-19, January 2026.ABSTRACT In this paper, we investigate the robust models for Λ$\Lambda$‐quantiles with partial information regarding the loss distribution, where Λ$\Lambda$‐quantiles extend the classical quantiles by replacing the fixed probability level with a probability/loss function Λ$\Lambda$.
Xia Han, Peng Liu
wiley +1 more source
The random graph process is globally synchronizing
Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.Abstract The homogeneous Kuramoto model on a graph G=(V,E)$G = (V,E)$ is a network of |V|$|V|$ identical oscillators, one at each vertex, where every oscillator is coupled bidirectionally (with unit strength) to its neighbors in the graph. A graph G$G$ is said to be globally synchronizing if, for almost every initial condition, the homogeneous Kuramoto
Vishesh Jain +2 more
wiley +1 more source
Plank theorems and their applications: A survey
Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.Abstract Plank problems concern the covering of convex bodies by planks in Euclidean space and are related to famous open problems in convex geometry. In this survey, we introduce plank problems and present surprising applications of plank theorems in various areas of mathematics.
William Verreault
wiley +1 more source
Convergence properties of preconditioned Hermitian and skew-Hermitian splitting methods for non-Hermitian positive semidefinite matrices [PDF]
, 2006 Zhong‐Zhi Bai +2 more
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A sequential semidefinite programming method and an application in passive reduced-order modeling
, 2005 We consider the solution of nonlinear programs with nonlinear semidefiniteness constraints. The need for an efficient exploitation of the cone of positive semidefinite matrices makes the solution of such nonlinear semidefinite programs more complicated ...
Freund, Roland W. +2 more
core
Journal of Mathematics, Volume 2026, Issue 1, 2026.Recently, there has been significant interest in filter methods for solving nonlinear problems. Extensions of these methods to nonlinear semidefinite programming (NLSDP) problems are described. A three‐dimensional filter sequential semidefinite programming (SSDP) algorithm with a feasible restoration phase is presented to efficiently solve NLSDPs with ...
Dandan Li, Songhua Wang, Pramita Mishra
wiley +1 more source
Preconditioning by an extended matrix technique for convection-diffusion-reaction equations
Journal of Numerical Analysis and Approximation Theory, 2008 In this paper we consider a preconditioning technique for the ill-conditioned systems arising from discretisations of nonsymmetric elliptic boundary value problems.
Aurelian Nicola, Constantin Popa
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Partial determinant inequalities for positive semidefinite block matrices [PDF]
, 2021 Yong ao Li, Xi in Lin, Lin Feng
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