Exact solutions for differential equations in Celestial Mechanics
Abstract There are many problems in Celestial Mechanics which can be reduced to differential equations, either linear or nonlinear. We…
Nonlinear analysis
Some variants of Ćirić’s multi-valued contraction principle
Abstract In this article, a study of the fixed point problem for Ciric type multi-valued operators is presented. More precisely, …
On the characteristic function and the resolving kernel of a given kernel
Original title (in French)Sur la fonction caractéristique et le noyau résolvant d’un noyau donné Abstract AuthorsDumitru V. Ionescu Dumitru V.…
Some existence theorems of integrals of systems of differential equations
Original title (in French)Quelques théorèmes d’existence des intégrales des systèmes d’équations différentielles Abstract AuthorsD.V. Ionescu Dumitru V. Ionescu (1901-1985) Keywords?…
On a system of second-order partial differential equations
Abstract AuthorsDumitru V. Ionescu Dumitru V. Ionescu Keywords? Paper coordinatesD.V. Ionescu, On a system of second-order partial differential equations, (French) Mathematica,…
On a problem relating to second-order partial differential equations
Abstract AuthorsDumitru V. Ionescu Dumitru V. Ionescu KeywordsPDFhttps://ictp.acad.ro/wp-content/uploads/2025/10/1927-IonescuDV-Sur-un-problem-relatif-aux-equations-aux-derivees-partielles-du-second-ordre-Bull.Soc_.Math_.pdf Paper coordinatesD.V. Ionescu, Sur un problem relatif aux equations aux derivees partielles…
Fuchs’s theorem
Abstract AuthorsDumitru V. Ionescu Dumitru V. Ionescu Keywords? Paper coordinatesD.V. Ionescu, Fuchs’s theorem, (in French) Bull. mathèm. de la Soc. roum.…
On a third-order partial differential equation
Abstract AuthorsDumitru V. Ionescu Dumitru V. Ionescu Keywords? Paper coordinatesD.V. Ionescu, Sur une équation aux dérivées partielles du troisième ordre,…
Remarks on a singular integral equation by M. E. Picard
Abstract AuthorsDumitru V. Ionescu Dumitru V. Ionescu Keywords? Paper coordinatesD.V. Ionescu, Remarks on a singular integral equation by M. E. Picard,…
Localization and multiplicity for stationary Stokes systems with variable viscosity
AbstractIn this paper we discuss the localization and the multiplicity of solutions for the stationary Stokes system with variable viscosity…