Results 51 to 60 of about 20,552 (179)
Large‐Amplitude Periodic Solutions to the Steady Euler Equations With Piecewise Constant Vorticity
Studies in Applied Mathematics, Volume 156, Issue 1, January 2026.ABSTRACT We consider steady solutions to the incompressible Euler equations in a two‐dimensional channel with rigid walls. The flow consists of two periodic layers of constant vorticity separated by an unknown interface. Using global bifurcation theory, we rigorously construct curves of solutions that terminate either with stagnation on the interface ...
Alex Doak +3 more
wiley +1 more source
Fredholm Weighted Composition Operators on Dirichlet Space
International Journal of Mathematics and Mathematical Sciences, 2012 This paper characterizes bounded Fredholm, bounded invertible, and unitary weighted composition operators on Dirichlet space.
Liankuo Zhao
doaj +1 more source
The index bundle for Fredholm morphisms [PDF]
, 2011 We extend the index bundle construction for families of bounded Fredholm operators to morphisms between Banach bundles.Comment: 15 ...
Waterstraat, Nils
core +1 more source
Abstract and Applied Analysis, Volume 2026, Issue 1, 2026.This article aims to present a new fixed point (FP) result for interpolative Kannan type and Ćirić‐Reich‐Rus type cyclic contractions (CRRTCCs) in dislocated quasi‐rectangular b‐metric spaces. We go through rigorous steps to prove the existence of a unique FP for the stated mapping in the setting of dislocated quasi‐rectangular b‐metric spaces.
Nigussa L. Bayissa +2 more
wiley +1 more source
Invertible and normal composition operators on the Hilbert Hardy space of a half–plane
Concrete Operators, 2016 Operators on function spaces of form Cɸf = f ∘ ɸ, where ɸ is a fixed map are called composition operators with symbol ɸ. We study such operators acting on the Hilbert Hardy space over the right half-plane and characterize the situations when they are ...
Matache Valentin
doaj +1 more source
Generalizations of Semi-Fredholm Operators [PDF]
Proceedings of the American Mathematical Society, 1995 Summary: On nonseparable Hilbert spaces there are multiple sets of operators that are analogous to the semi-Fredholm operators on a separable space. We develop the properties of these sets and relate those properties to some recent research. We conclude with a theorem that indicates precisely how far one can go from a given generalized semi-Fredholm ...
openaire +2 more sources
Regularization by Global DGMRES Method for Ill‐Posed Matrix Equation AXB = G
Advances in Mathematical Physics, Volume 2026, Issue 1, 2026.In this article, we deal with the solution of the linear, large‐size, and ill‐posed matrix equation AXB = G, whose matrix G is contaminated with noise. We apply Tikhonov regularization in combination with the Gl‐DGMRES method to mitigate the effect of noise.
Vahid Hosseinabadi +2 more
wiley +1 more source
Fredholm notions in scale calculus and Hamiltonian Floer theory [PDF]
, 2016 We give an equivalent definition of the Fredholm property for linear operators on scale Banach spaces and introduce a (nonlinear) scale Fredholm property with respect to a splitting of the domain.
Wehrheim, Katrin
core
Exponential Dichotomies and Fredholm Operators [PDF]
Proceedings of the American Mathematical Society, 1988 It is shown that if the operator ( L x ) ( t ) = x ˙ ( t ) − A ( t ) x (
openaire +1 more source
International Journal of Mathematics and Mathematical Sciences, Volume 2026, Issue 1, 2026.This paper introduces a new numerical method for solving a class of two‐dimensional fractional partial Volterra integral equations (2DFPVIEs). Our approach uses Lucas polynomials (LPs) to construct operational matrices (OMs) that effectively transform the complex fractional‐order equations into a more manageable system of algebraic equations.
S. S. Gholami +4 more
wiley +1 more source