Posts by ictp

On the automorphisms of the fundamental group of a closed orientable surface

Abstract AuthorsGh. Călugăreanu Gheorghe Călugăreanu (1902-1976) Keywords? Paper coordinatesGh. Călugăreanu, Sur les automorphismes du groupe fondamental d’une surface fermée orientable, Bulletin of the Iasi Polytechnic Institute, New Series, Volume XIV (XVIII),…

Some observations on nomograms with aligned points of genus one and two with regular rectilinear scales

Abstract AuthorsL. Bal Institutul de Calcul Keywords? Paper coordinatesL. Bal, Some observations on nomograms with aligned points of genus one and two with regular rectilinear scales, (Romanian) Bul. Şti. Inst. Politehn. Cluj 11 1968 21–24.…

Application of some fixed-point methods in the study of the polylocal problem relating to nonlinear differential equations

Abstract AuthorsO. Arama Institutul de Calcul Keywords? Paper coordinatesO. Aramă, Application de certaines methodes de point-fix dans l’etude du probleme polylocal relatif aux equations differentielles non-lineaires. Seminar cu tema: Teoria interpolării şi noţiunea…

On an interpolation problem relating to the solutions of fourth-order linear differential equations

Abstract AuthorsO. Arama Institutul d eCalcul Keywords? Paper coordinatesO. Aramă, Sur un problème d’interpolation relatif aux solutions des équations différentielles linéaires du quatrième ordre. (French) Mathematica (Cluj) 10 (33) 1968 5–15. PDFhttps://ictp.acad.ro/wp-content/uploads/2025/11/1968-Arama-Sur-un-probleme-dinterpolation.pdf About this…

On an assignment problem

Abstract AuthorsSt. Tigan Institutul de Calcul Keywords? Paper coordinatesSt. Țigan, Sur une probleme d’affectation, Mathematica, vol. 11 (34), 1, 1969, pp.163-166 PDFhttps://ictp.acad.ro/wp-content/uploads/2025/11/1969-Tigan-Sur-une-probleme-daffectation.pdf About this paperJournalPublisher NameDOIPrint ISSNMathematica Online ISSNgoogle scholar link…

On the bilocal problem relating to second-order differential equations

Abstract AuthorsD. Ripianu (Ripeanu) Institutul de Calcul Keywords? Paper coordinatesD. Ripianu (Ripeanu), Sur le problème bilocal relatif aux équations différentielles du second ordre. (French) Mathematica (Cluj) 11 (34) 1969 329–353. PDFhttps://ictp.acad.ro/wp-content/uploads/2025/11/1969-Ripeanu-Sur-le-probleme-bilocale.pdf About this…

Embedding incidence structures in projective planes with given closure theorems

Abstract AuthorsF. Rado Institutul de Calcul Keywords? Paper coordinatesF. Radó, Einbettung von Inzidenzstrukturen in projektive Ebenen mit vorgegebenen Schliessungssätzen. (German) Arch. Math. (Basel) 20 1969 311–319. PDFhttps://ictp.acad.ro/wp-content/uploads/2026/09/1969-Rado-German-Arch.-Math-Einbettung-von-Inzidenzstrukturen-in-projektive-Ebenen-mit-vorgegebenen-Schliessungssatzen-311–319.pdf About this paperJournalArchiv der Mathematik Publisher…

Representation of non-injective collineations of a projective space by generalized semilinear maps

Abstract AuthorsF. Rado Institutul de Calcul Keywords? Paper coordinatesF. Radó, Darstellung nicht-injektiver Kollineationen eines projektiven Raumes durch verallgemeinerte semilineare Abbildungen. (German) Math. Z. 110 1969 153–170. PDFhttps://ictp.acad.ro/wp-content/uploads/2026/09/1969-Rado-German-Math.-Darstellung-nicht-injektiver-Kollineationen-eines-projektiven-Raumes-durch-verallgemeinerte-semilineare-Abbildungen.pdf About this paperJournalMathematische Zeitschrift Publisher NameSpringer DOIPrint ISSN0025-5874…

The determination of optimal transformations of certain nomograms with aligned points

Abstract AuthorsF. Radó Institutul de Calcul S. Groze Keywords? Paper coordinatesF. Radó, S. Groze, The determination of optimal transformations of certain nomograms with aligned points. (Romanian) Studia Univ. Babeş-Bolyai Ser. Math.-Phys. 14 1969 no. 2,…

On a type of topological interpolation

Abstract AuthorsP. Petrisor Institutul de Calcul Keywords? Paper coordinatesP. Petrişor, Sur un type d’interpolation topologique, (French) Mathematica (Cluj) 11 (34) 1969 143–146. PDFhttps://ictp.acad.ro/wp-content/uploads/2025/11/1969-Petrisor-Sur-un-type-dinterpolation.pdf About this paperJournalMathematica Publisher Namepublished by the Romanian Academy Publishing House DOIPrint…