3 papers
math.FA2025
Admissible perturbations of a multivalued Picard operator: Ćirić contraction condition; fixed point and stability results
Cristina Gheorghe
This paper studies strict fixed point and stability results for multivalued operators which does not satisfy a Ćirić type contraction condition, but their admissible perturbation d…
math.AP2025
Stratified equatorial flows in cylindrical coordinates with surface tension
Cristina Gheorghe, Andrei Stan
This paper considers a mathematical model of steady flows of an inviscid and incompressible fluid moving in the azimuthal direction. The water density varies with depth and the wav…
math.FA2025
Strict fixed point problem, stability results and retraction displacement condition for Picard operators
Cristina Gheorghe, Adrian Petruşel
The aim of this paper is to give strict fixed point principles for multivalued operators satisfying some contraction conditions of Ćiri\' c and of Ćiri\' c-Re…