Janusz Brzdek

20 papers Journal 20
YearRankTypeTitle / Venue / Authors
2025 J jnl
Banach Limit and Fixed Point Approach in the Ulam Stability of the Quadratic Functional Equation.
Axioms
El-Sayed El-Hady, Janusz Brzdek
2025 J jnl
On Ulam Stability of the Davison Functional Equation in m-Banach Spaces.
Axioms
El-Sayed El-Hady, Janusz Brzdek
2024 J jnl
On Solutions of Some Functional Equations of Radical Type.
Symmetry
Janusz Brzdek
2024 J jnl
Some Comments on the Superstability of a General Functional Equation.
Symmetry
Janusz Brzdek
2024 J jnl
Some Remarks on the Best Ulam Constant.
Symmetry
Janusz Brzdek
2023 J jnl
On Ulam Stability with Respect to 2-Norm.
Symmetry
Janusz Brzdek
2023 J jnl
Remarks on Approximate Solutions to Difference Equations in Various Spaces.
Symmetry
Janusz Brzdek
2022 J jnl
On Solutions and Stability of Stochastic Functional Equations Emerging in Psychological Theory of Learning.
Axioms
Ali Turab, Janusz Brzdek, Wajahat Ali
2022 J jnl
On Ulam Stability of Functional Equations in 2-Normed Spaces - A Survey II.
Symmetry
El-Sayed El-Hady, Janusz Brzdek
2022 J jnl
Ulam Stability of a General Linear Functional Equation in Modular Spaces.
Symmetry
Issam Aboutaib, Chaimaa Benzarouala, Janusz Brzdek, Zbigniew Lesniak, Lahbib Oubbi
2021 J jnl
Applications of Banach Limit in Ulam Stability.
Symmetry
Roman Badora, Janusz Brzdek, Krzysztof Cieplinski
2021 J jnl
On Ulam Stability of Functional Equations in 2-Normed Spaces - A Survey.
Symmetry
Anna Bahyrycz, Janusz Brzdek, El-Sayed El-Hady, Zbigniew Lesniak
2021 J jnl
On the Stability of a Generalized Fréchet Functional Equation with Respect to Hyperplanes in the Parameter Space.
Symmetry
Janusz Brzdek, Zbigniew Lesniak, Renata Malejki
2020 J jnl
On the Continuous Cancellative Semigroups on a Real Interval and on a Circle and Some Symmetry Issues.
Symmetry
Mariusz Bajger, Janusz Brzdek, El-Sayed El-Hady, Eliza Jablonska
2016 J jnl
On approximate solutions of some delayed fractional differential equations.
Appl. Math. Lett.
Janusz Brzdek, Nasrin Eghbali
2016 J jnl
Stability for a family of equations generalizing the equation of p-Wright affine functions.
Appl. Math. Comput.
Janusz Brzdek, Liviu Cadariu
2014 J jnl
Remarks on stability and non-stability of the linear functional equation of the first order.
Appl. Math. Comput.
Janusz Brzdek, Dorian Popa, Bing Xu
2012 J jnl
Remarks on the Hyers-Ulam stability of some systems of functional equations.
Appl. Math. Comput.
Janusz Brzdek, Krzysztof Cieplinski
2011 J jnl
Note on nonstability of the linear functional equation of higher order.
Comput. Math. Appl.
Janusz Brzdek, Dorian Popa, Bing Xu
2010 J jnl
Remarks on stability of linear recurrence of higher order.
Appl. Math. Lett.
Janusz Brzdek, Dorian Popa, Bing Xu