Open Access Published by De Gruyter Open Access

Volume 30 Issue 2

January 1997

Issue of Demonstratio Mathematica

Open Access December 20, 2017

The Logic Induced by a System of Homomorphisms and Its Various Algebraic Characterizations

Dietmar Dorninger, Helmut Länger, Maciej Mączyǹski

Page range: 215-232

Download PDF

Open Access December 20, 2017

On the Structure of Fixed Point Sets of “K-Set-Contractions” in B⁰ Spaces

Krzysztof Czarnowski

Page range: 233-246

Download PDF

Open Access December 20, 2017

The Lattice of Rough Subsets of a Rough Set. The Category of Rough Sets

Teresa Biegaǹska

Page range: 247-262

Download PDF

Open Access December 20, 2017

A Common Fixed Point Theorem for Compatible Mappings

R. A. Rashwan

Page range: 263-270

Download PDF

Open Access December 20, 2017

A Note on Precontinuity and Quasicontinuity for Multifunctions

Valeriu Popa, Takashi Noiri

Page range: 271-278

Download PDF

Open Access December 20, 2017

Oscillatory Behaviour of First Order Linear Neutral Differential Equations with Distributed Delays

Bao Jundong

Page range: 279-292

Download PDF

Open Access December 20, 2017

Some Remarks on Orthogonality and Best Approximation

S. S. Kim, Y. J. Cho, T. D. Narang

Page range: 293-300

Download PDF

Open Access December 20, 2017

Some Fixed Point Theorems in Quasi-Metric Spaces

B. E. Rhoades

Page range: 301-306

Download PDF

Open Access December 20, 2017

On Automorphisms of Prime Rings with Involution

L. A. Khan, A. B. Thaheem

Page range: 307-312

Download PDF

Open Access December 20, 2017

On Connections Among some Orthomodular Structures

Sylvia Pulmannová

Page range: 313-328

Download PDF

Open Access December 20, 2017

Some Integral Form of the Logarithm in Commutative Banach Algebras

I. Dziubiński, J. Polubiński

Page range: 329-338

Download PDF

Open Access December 20, 2017

Rate of Convergence of Modified Baskakov Operators

Vijay Gupta, D. Kumar

Page range: 339-346

Download PDF

Open Access December 20, 2017

Some Remarks on 2-Elements and 2-Subgroups of Finite Groups

Ion Armeanu

Page range: 347-352

Download PDF

Open Access December 20, 2017

Dual of Non-Commutative L^p∞-Spaces with 0 < p ≤ 1

Leszek Jan Ciach

Page range: 353-358

Download PDF

Open Access December 20, 2017

The Semi-Darkness of Heat Diffraction on the Polyhedron Area

Józef Sidorowicz, Tomasz Kowalski

Page range: 359-372

Download PDF

Open Access December 20, 2017

On the Strong Componentwise Stability and H-Matrices

Dragoslav Herceg, Natasa Krejić

Page range: 373-378

Download PDF

Open Access December 20, 2017

On A System Of Nonlinear Singular Integral Equations In An Euclidean Space Rⁿ

Wanda Sznitko

Page range: 379-386

Download PDF

Open Access December 20, 2017

Analytic Formulae for Determinant Systems for a Certain Class of Fredholm Operators in Banach Spaces

Grażyna Ciecierska

Page range: 387-402

Download PDF

Open Access December 20, 2017

Classification of Five-Dimensional Lie Algebras of Class T₂

Leon Bieszk

Page range: 403-424

Download PDF

Open Access December 20, 2017

The Generalized Fourier Transforms of Slowly Increasing Functions

Władysław Kierat, Urszula Sztaba

Page range: 425-428

Download PDF

Open Access December 20, 2017

The Kolmogorov-Sinaj Theorem on Generators for Fuzzy Dynamical Systems

B. Riečan, D. Markechová

Page range: 429-436

Download PDF

Open Access December 20, 2017

On Classification of the Linear Lagrangian and Isotropic Subspaces

Małgorzata Mikosz

Page range: 437-450

Download PDF

Open Access December 20, 2017

The Decomposition of Any Projectivity of the Projective Plane Onto some Special Central Collineations

Mirosław Brzozowy

Page range: 451-460

Download PDF

Open Access December 20, 2017

An Existence Theorem for a Parabolic Differential Equation in l^∞{A) Based on the Tarski Fixed Point Theorem

Uwe Schäfer

Page range: 461-464

Download PDF

Open Access December 20, 2017

Maps on Complex Manifolds into Grassmann Spaces Defined by Reproducing Kernels of Bergman Type

Marcin Monastyrski, Zbigniew Pasternak-Winiarski

Page range: 465-474

Download PDF

About this journal

Demonstratio Mathematica is a fully peer-reviewed, open access, electronic journal devoted to functional analysis, approximation theory, and related topics. The journal provides readers with free, instant, and permanent access to all content worldwide.

Demonstratio Mathematica accepts submissions of research articles, reviews, and communications. Submission of a manuscript implies that the work described is not copyrighted, published, or submitted elsewhere, except in abstract form. The corresponding author should ensure that all authors approve the manuscript before submission.

Aims and Scope

The potential topics include (but are not limited to):

Approximation theory and iteration methods

Fixed point theory and methods of computing fixed points

Functional, ordinary and partial differential equations

Nonsmooth analysis, variational analysis and convex analysis

Optimization theory, variational inequalities and complementarity problems

Volume 30 Issue 2

Issue of Demonstratio Mathematica

The Logic Induced by a System of Homomorphisms and Its Various Algebraic Characterizations

On the Structure of Fixed Point Sets of “K-Set-Contractions” in B0 Spaces

The Lattice of Rough Subsets of a Rough Set. The Category of Rough Sets

A Common Fixed Point Theorem for Compatible Mappings

A Note on Precontinuity and Quasicontinuity for Multifunctions

Oscillatory Behaviour of First Order Linear Neutral Differential Equations with Distributed Delays

Some Remarks on Orthogonality and Best Approximation

Some Fixed Point Theorems in Quasi-Metric Spaces

On Automorphisms of Prime Rings with Involution

On Connections Among some Orthomodular Structures

Some Integral Form of the Logarithm in Commutative Banach Algebras

Rate of Convergence of Modified Baskakov Operators

Some Remarks on 2-Elements and 2-Subgroups of Finite Groups

Dual of Non-Commutative Lp∞-Spaces with 0 < p ≤ 1

The Semi-Darkness of Heat Diffraction on the Polyhedron Area

On the Strong Componentwise Stability and H-Matrices

On A System Of Nonlinear Singular Integral Equations In An Euclidean Space Rn

Analytic Formulae for Determinant Systems for a Certain Class of Fredholm Operators in Banach Spaces

Classification of Five-Dimensional Lie Algebras of Class T2

The Generalized Fourier Transforms of Slowly Increasing Functions

The Kolmogorov-Sinaj Theorem on Generators for Fuzzy Dynamical Systems

On Classification of the Linear Lagrangian and Isotropic Subspaces

The Decomposition of Any Projectivity of the Projective Plane Onto some Special Central Collineations

An Existence Theorem for a Parabolic Differential Equation in l∞{A) Based on the Tarski Fixed Point Theorem

Maps on Complex Manifolds into Grassmann Spaces Defined by Reproducing Kernels of Bergman Type

On the Structure of Fixed Point Sets of “K-Set-Contractions” in B⁰ Spaces

Dual of Non-Commutative L^p∞-Spaces with 0 < p ≤ 1

On A System Of Nonlinear Singular Integral Equations In An Euclidean Space Rⁿ

Classification of Five-Dimensional Lie Algebras of Class T₂

An Existence Theorem for a Parabolic Differential Equation in l^∞{A) Based on the Tarski Fixed Point Theorem