Ulam Stability of Operators | Poland) Krakow Pedagogical University Janusz (Department of Mathematics Brzdek, Romania) Cluj-Napoca Technical University of Cluj-Napoca Dorian (Department of Mathematics Popa, Romania) Cluj-Napoca Technical University of Cl
![Ulam Stability of Operators | Poland) Krakow Pedagogical University Janusz (Department of Mathematics Brzdek, Romania) Cluj-Napoca Technical University of Cluj-Napoca Dorian (Department of Mathematics Popa, Romania) Cluj-Napoca Technical University of Cl]()