• On solution for fractional differential equations using upper and lower solutions method 

  Chirouf, Rafida (University of Guelma, 2023)

  We are interested in this memory in nonlinear differential equations,this type of equations describes many phenomena.The objective of this memory is to study the approximate solution for solving a class of nonlinear ...
• Mean values of arithmetic functions 

  Zitouni, Naima (University of Guelma, 2023)

  In this work, we understand the basic arithmetic functions, as well as chebyshev’s functions. Next, we present famous summation formulas with proofs. For example: The Euler summation formula and partial summation formula. ...
• Cycles limites de quelques classes d’équations de Mathieu-Duffing perturbées 

  Zeraoulia, Warda (University of Guelma, 2023)

  Abstract In this work, Örst we study the maximum number of limit cycles for a class of polynomial di§erential systems that can bifurcate from the periodic orbits of the linear center _x = y; _y =
• Étude de l’existence, l’unicité, la positivité et la stabilité de quelques problèmes fractionnaires non linéaires 

  ZADEM, Hadil (University of Guelma, 2023)

  The fixed-point principle has many applications. It is involved in the resolution of se- veral nonlinear differential equations in particular, in the study of existence and unique- ness. In our work, first we investigate ...
• Sur un problème aux limites engendré par une équation différentielle du troisième ordre 

  Tlidjani, Roumayssa (University of Guelma, 2023)

  Líojective of this work presented in this memory is to apply the reproducing ker- nel Hilbert space methode(RKHSM ) for solving third order di§erential equations with multiple characteristics in a recangular domain. The ...
• Sur la concentration de masse d'un condensat de Bose-Einstein. 

  TABANE, Imane (University of Guelma, 2023)

  We consider two-dimensional Bose–Einstein condensates with attractive interac- tion, described by the Gross–Pitaevskii functional. Minimizers of this functional exist only if the interaction strength a satisfies a < a∗ ...
• Inégalités intégrales de type Bullen-Simpson 

  Samoudi, Sarra (University of Guelma, 2023)

  The aim of this memory, is to study the Bullen-Simpson type inequalities for function whose first derivatives are s- convex, bounded as well as Holderian. for this we propose: In the first chapter, a preliminaries ...
• Study of a Snap problem in the Hilfer - Katugampola sense 

  Ouled, Meriem Feriel (University of Guelma, 2023)

  Abstract In our thesis, inspired by the work of Berhail, A., Tabouche, N., Matar, M.M., Samei, M.E., Kaabar, M.K.A., Xiaofeng Wang and Xiao-Guang Yue, which primarily concerns itself with addressing the underlying issues ...
• Existence et contrôlabilité trajectoire pour les équations différentielles fractionnaires ψ-Caputo 

  NASRI, Ghada (University of Guelma, 2023)

  Conclusion Dans ce mémoire, nous avons présenter une étude de l’existence et la contrôlabilité trajectoire d’un système non linéaire gouvernés par des équations différentielles fractionnaires de ψ-Caputo avec des ...
• Existence and Stability Results of Fractional Stochastic Differential Equations with Lévy Noise 

  MEZARA, INES (University of Guelma, 2023)

  The aim of this work is to study that the existence of solution of stochastic fractional di§eren- tial equations with LÈvy noise is established by the Picard-Lindelˆf successive approximation scheme. The stability of ...
• Deux méthodes de régularisation pour un problème inverse de conduction thermique semi-linéaire mal-posé 

  LAMOURI, Selma (University of Guelma, 2023)

  ii Abstract The present memory we consider an inverse semi linear heat conduction problem, and we assume that there existe a heat source which is significantly dependant on space, time and temperature and heat flux. The ...
• Traitement d’une équation de vollerra avec un noyau de singularité double 

  Labiod, Safa (University of Guelma, 2023)

  In this thesis, we are interested in the Volterra nonlinear integral equation with two weakly singular kernels. The purpose is to put the problemin a functional framework to come out with acceptable hypotheses, so a ...
• Sur les systèmes différentiels à coefficients périodiques 

  Kardoussi, Chorouk (University of Guelma, 2023)

  Abstract In this work, we are interested in studying the differential equation with periodic coeffi- cients of the form : ˙x = A(t)x, x ∈ Rn. where A(t + T) = A(t). We will define some initial concepts related to ...
• Solutions périodiques de certaines classes d’équations différentielles ordinaires du quatrième ordre 

  Jennah, Sara (University of Guelma, 2023)

  Dans ce mémoire, on étudie les cycles limites de trois classes d'équations différentielles ordinaires autonomes et autonomes non du quatrième ordre. en utilisant la théorie de moyennisation du premier ordre La première ...
• Distribution de Lindley modifiée, propriétés et applications 

  Hassainia, Chaima (University of Guelma, 2023)

  This paper aims to study a modified Lindley distribution with a simple one‐parameter defined using an exponential fitting function which depends on only one parameter. Its main properties are investigated, with emphasis ...
• Inégalité d'Hermite-Hadamard pour Différents types de Convexité 

  Hameri, Roumayssa (University of Guelma, 2023)

  In this memory, we will focus on the study of inequality of the Hermite-Hadamard for standard difference of convexity. In the first chapter, we recall some definitions of classical convexity, as well as some classes of ...
• Integro-differential Volterra Equation with delay term 

  HADDOUCHE, Khawla (University of Guelma, 2023)

  "As part of this master's thesis, we focus on a new equation integro-di erential tion of Volterra with a delay term: ∀t ∈ [a; b], u(t) = int^α(t)_aN(t, s, u(s), u′(s))ds + f(t), Our main objective is to prove the ...
• Systèmes dynamiques : applications en dynamique des populations 

  Haddad, Chahra (University of Guelma, 2023)

  In this thesis, we are interested in the applications of dynamical systems in Biology, by studying continuous models of population dynamics. For a single population, we will study the continuous models of Malthus and ...
• Quelques théorèmes du point fixe dans des espaces métriques et leurs applications 

  GHARSSI, SARRA (University of Guelma, 2023)

  The fixed point theory is a highly useful tool that is applied to almost all branches of mathematical analysis. by applying the other existing theories there are many problems that cannot be solved but can be easily ...
• Inégalités intégrales de type Euler-Simpson 

  Fridjat, Ali (University of Guelma, 2023)

  The aim of this memory, is to study the Euler-Simpson type inequalities for functions whose first derivatives are s-convex, bounded as well as Hölderian. For this we propose : In the first chapter, a preliminaries ...

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