https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7172 الندوات والأيام الدراسية Sun, 05 Apr 2026 16:58:28 GMT 2026-04-05T16:58:28Z http://dspace.univ-ghardaia.edu.dz:80/jspui/retrieve/6bce246b-9876-4d94-9175-f8007aeab060/ https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7172 https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9378 Title: Programme de la Journée Workshop N° 02 des doctorants ENR-ELT Authors: Department, of Mathematics and Computer Science Abstract: Planning de la journée du Workshop Programme de travail de la journée du Mercredi 31 Janvier 2024 Fri, 31 Jan 2025 00:00:00 GMT https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9378 2025-01-31T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9377 Title: Open Study Day Math Day: Geometry, Fractional Equations & Algebra Authors: Department, of Mathematics and Computer Science; Laboratory, of Mathematics and Applied Sciences Abstract: Open Study Day Math Day: Geometry, Fractional Equations & Algebra Mon, 05 May 2025 00:00:00 GMT https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9377 2025-05-05T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9376 Title: Partial Differential Equations & Ordinary Differential Equations: Theory and Applications Authors: Department, of Mathematics and Computer Science; Laboratory, of Mathematics and Applied Sciences Abstract: In our presentation, we spotlight the theory of C0 semigroups as a fundamental tool for analyzing evolution equations in Banach spaces. We begin by reviewing the general properties of C0 semigroups and their role in describing the time evolution of systems governed by linear operators. The discussion then moves to the abstract Cauchy problem, emphasizing conditions for the existence, uniqueness, and regularity of solutions using semigroup methods. We extend these ideas to nonlinear evolution equations, highlighting techniques that address the challenges posed by nonlinearity. Special attention is given to delay differential equations (DFEs), where the system’s future state depends on its history. After providing an overview of delayed systems, we discuss two major cases: abstract linear delayed equations and semi-linear delayed equations, showing how semigroup theory adapts to account for memory effectsL’objectif de cet exposé est de prouver l’existence et l’unicité d’une solution d’un problème de Goursat non linéaire dans la classe des fonctions quasi-analytiques de type Denjoy- Carleman, plus précisément dans l’ensemble des fonctions continues Denjoy-Carleman. L’idée est de transformer le problème integro-diferentiel à un problème de point fixe appliqué dans une boule fermée dans une algèbre de Banach définie par une série formelle et une suite numérique logarithméquement convexe convenablement choisieA problem of initial value problem for a nonlinear Caputo fractional differential equation on an unbounded interval is considered. Based on some fractional calculus and the Krasnoselskii’s fixed point theorem, we prove our main results (existence and asymptotic stability). Then we give an example to illustrate our study.s..It is our pleasure to cordially invite all professors and students to participate in an Open Study Day dedicated to Ordinary Differential Equations (ODE) & Partial Differential Equations (PDE). Mon, 28 Apr 2025 00:00:00 GMT https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9376 2025-04-28T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9375 Title: phd workshop Authors: كلية, العلوم والتكنولوجيا Abstract: ايام دكتوريال تخصص طاقات متجددة في الاكتروتقني لجميع الاسات\ة والباحثين المهتمين بكلية العلوم والتكنولوجياايام 21 و 22 ماي 2025 Tue, 20 May 2025 00:00:00 GMT https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/9375 2025-05-20T00:00:00Z