Journal of Function Spaces
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Acceptance rate23%
Submission to final decision52 days
Acceptance to publication85 days
CiteScore0.750
Impact Factor1.005
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Exponential Polynomials and Nonlinear Differential-Difference Equations

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Journal of Function Spaces publishes research on all aspects of function spaces, functional analysis, and their employment across other mathematical disciplines.

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Journal of Function Spaces maintains an Editorial Board of practicing researchers from around the world, to ensure manuscripts are handled by editors who are experts in the field of study.

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We currently have a number of Special Issues open for submission. Special Issues highlight emerging areas of research within a field, or provide a venue for a deeper investigation into an existing research area.

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Composition Operators on Some Banach Spaces of Harmonic Mappings

We study the composition operators on Banach spaces of harmonic mappings that extend several well-known Banach spaces of analytic functions on the open unit disk in the complex plane, including the α-Bloch spaces, the growth spaces, the Zygmund space, the analytic Besov spaces, and the space .

Research Article

A Characterization on Singular Value Inequalities of Matrices

We obtain a characterization of pair matrices A and B of order n such that where denotes the j-th largest singular values of It can imply not only some well-known singular value inequalities for sums and direct sums of matrices but also Zhan’s result related to singular values of differences of positive semidefinite matrices. In addition, some related and new inequalities are also obtained.

Research Article

Approximation of an Additive -Random Operator Inequality

We solve the additive -random operator inequality , in which are fixed and . Finally, we get an approximation of the mentioned additive -random operator inequality by direct technique.

Research Article

A Note on Conformable Double Laplace Transform and Singular Conformable Pseudoparabolic Equations

In this work, we combine conformable double Laplace transform and Adomian decomposition method and present a new approach for solving singular one-dimensional conformable pseudoparabolic equation and conformable coupled pseudoparabolic equation. Furthermore, some examples are given to show the performance of the proposed method.

Research Article

On the Growth Order and Growth Type of Entire Functions of Several Complex Matrices

In this paper, we establish an explicit relation between the growth of the maximum modulus and the Taylor coefficients of entire functions in several complex matrix variables (FSCMVs) in hyperspherical regions. The obtained formulas enable us to compute the growth order and the growth type of some higher dimensional generalizations of the exponential, trigonometric, and some special FSCMVs which are analytic in some extended hyperspherical domains. Furthermore, a result concerning linear substitution of the mode of increase of FSCMVs is given.

Research Article

Invariance of Deficiency Indices of Second-Order Symmetric Linear Difference Equations under Perturbations

This paper focuses on the invariance of deficiency indices of second-order symmetric linear difference equations under perturbations. By applying the perturbation theory of Hermitian linear relations, the invariance of deficiency indices of the corresponding minimal subspaces under bounded and relatively bounded perturbations is built. As a consequence, the invariance of limit types of second-order symmetric linear difference equations under bounded and relatively bounded perturbations is obtained.

Journal of Function Spaces
 Journal metrics
Acceptance rate23%
Submission to final decision52 days
Acceptance to publication85 days
CiteScore0.750
Impact Factor1.005
 Submit