boussetila nadjib | université 8 Mai 1945 Guelma

Research Keywords:

PDEs and Inverse Problems, Regularization of Ill-Posed Problems, Fredholm Integral Equations of the First Kind, Krylov Approximation Methods, Time-Fractional PDEs, Numerical, Non Classical PDEs, Methods

Rank:

Professor

Department:

Department of Mathematics

Faculty:

Faculty of Mathematics, Computer Science and Materials Science

Campus: Ancien Campus

037116025

boussetila.nadjib@univ-guelma.dz
n.boussetila@gmail.com

Google Scholar Link:

https://scholar.google.fr/citations?user=7GRFfvYAAAAJ&hl=fr&oi=ao

Rersearchgate Link:

https://www.researchgate.net/profile/Boussetila_Nadjib

Scopus profile:

https://www.scopus.com/authid/detail.uri?authorId=57200382376

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Biography and positions

Biography and positions :

Prof. Dr. Nadjib Boussetila obtained his Ph.D. in Mathematics (PDEs and Functional Analysis) from Annaba University (2006) and his Habilitation Universitaire (2008). He has 28 years of experience (1998–2026) at the University of Guelma, Algeria.

His research interests include inverse problems in PDEs, numerical analysis, fractional PDEs as regularization procedures, Krylov subspace methods, and Fredholm integral equations.
Academic Positions:
• Assistant Teacher
1998–2006 – University of Guelma
• Lecturer B
2006–2008 – University of Guelma
• Lecturer A
2008–2014 – University of Guelma
• Professor
Since 2014 – University of Guelma

Supervision of students

Supervision of students:

Doctorat

10. Titre de la thèse : Régularisation et approximation numérique d'une classe de problèmes inverses de type fractionnaire
Nom du doctorant(e): Benabbas Fares.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib, Saker Hacene.
Type de Doctorat: LMD. Annaba (soutenue le 31 octobre 2024)

09. Titre de la thèse : APPROXIMATION NUMERIQUE DE CERTAINES EQUATIONS INTEGRALES DE PREMIERE ESPECE PAR DES METHODES SPECTRALES.
Nom du doctorant(e): Bechouat Tahar.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib, Rebbani Faouzia.
Type de Doctorat: Sciences.
Année de soutenance: 2021, Annaba.

08. Titre de la thèse : STABILISATION ET APPROXIMATION NUMERIQUE D'UNE CLASSE DE PROBLEMES INVERSES
Nom du doctorant(e): Meziani Mohamed Sief Eddine.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib, Rebbani Faouzia.
Type de Doctorat: Sciences.
Année de soutenance: 2021, Annaba.

07. Titre de la thèse : Méthodes variationnelles de régularisation pour une classe de problèmes inverses en EDP.
Nom du doctorant(e): Sassane Roumaissa.
Nom de l'encadreur/co-encadreur: Rebbani Faouzia, Boussetila Nadjib.
Type de Doctorat: LMD.
Année de soutenance: 2020, Annaba.

06. Titre de la thèse : Sur quelques méthodes de régularisation appliquées à une classe de problèmes de Cauchy inverses.
Nom du doctorant(e): Khelili Besma.
Nom de l'encadreur/co-encadreur: Rebbani Faouzia, Boussetila Nadjib.
Type de Doctorat: Sciences.
Année de soutenance: 2018, Annaba.

05. Titre de la thèse : Stabilisation et approximation numérique d'une classe de problèmes inverses en EDP.
Nom du doctorant(e): Coulibaly Ousmane Samba.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib.
Type de Doctorat: Sciences.
Année de soutenance: 2017, FST. Bamako, Mali.

04. Titre de la thèse : Régularisation et approximation numérique de quelques problèmes mal posés.
Nom du doctorant(e): Neggal Bilel.
Nom de l'encadreur/co-encadreur: Rebbani Faouzia, Boussetila Nadjib.
Type de Doctorat: LMD.
Année de soutenance: 2017, Annaba.

03. Titre de la thèse : Etude de certains problèmes inverses elliptiques et paraboliques.
Nom du doctorant(e): Hamida Salim.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib, Rebbani Faouzia.
Type de Doctorat: Sciences.
Année de soutenance: 2015, Annaba.

02. Titre de la thèse : Sur quelques méthodes itératives pour une classe de problèmes inverses en EDP.
Nom du doctorant(e): Lakhdari Abdelghani.
Nom de l'encadreur/co-encadreur: Boussetila Nadjib.
Type de Doctorat: LMD.
Année de soutenance: 2015, Guelma.

01. Titre de la thèse : Sur quelques méthodes itératives appliquées à certains problèmes inverses.
Nom du doctorant (e): Bouzitouna Abdallah.
Nom de l'encadreur/co-encadreur: Rebbani Faouzia, Boussetila Nadjib.
Type de Doctorat: LMD.
Année de soutenance: 2014, Annaba.

Magister

1. Meziani Mohamed Seyf-Eddine, Etude d’un problème de Cauchy mal posé avec des conditions de Dirichlet, 04/11/2010/ U. Guelma.

2. Bechouat Taher, Résolution numérique d’une classe de problèmes inverses, 07/02/2013/ U. Guelma

Master

1. Farhi Sassia, Approximation numérique d’un probléme invese d’identification de source par la méthode de projection de Krylov, juin 2018/U. Guelma

2. Zeghdoudi Ahlem, Sur quelques principes du maximum et leurs applications en EDP, juin 2018/U. Guelma.

3. Abbassi Marwa, Benmarce Bochra, Méthodes de projection régularisée pour les équations intégrales de Fredholm de première espèce, juin 2017/U. Guelma.

4. Debbouche Nadjette, Equation de la chaleur avec arguments déviés, juin 2016/U. Guelma.

5. Batah Fatiha, Méthode de Newton modifiée, juin 2015/U. Guelma.

6. Afaifia Wennassa, Méthodes proximales pour la résolution de problèmes inverses juin, 2014/ U. Guelma.

7. M’Rabet Nawal, Khellaf Widad, Problème de Calderon de la conductivité inverse, juin 2013/U. Guelma.

8. Zalani Amina, Approximation numérique d’une équation intégrale de première espèce par la méthode Sinc-Collocation, juin 2012/U. Guelma.

9. Djoudi Wissem, Etude d’un problème inverse spectral de type Sturm-Liouville, juin 2012/U. Guelma

10. Maaichia Hayet, Silini Hayet, Opérateurs Auto-adjoints à Résolvante Compacte et Principe de Min-Max juin 2011/U. Guelma.

11. Himeur Abdelkrim, Formes sectorielles fermées et génération du semigroupes, juin 2011/U. Guelma.

Teaching documents

Teaching documents:

Calculus, Algebra, Analysis, Measure theory, Differential geometry, Maple programming, LaTeX,
Numerical Analysis, Spectral theory, Functional analysis, Dissipative and conservative systems,
Topology, Inverse and Ill-Posed Problems, Numerical Linear Algebra, Mathematics for Physics

Ongoing research project

Ongoing research project:

Membre des projets de recherche CNEPRU/PNR (achevés)

1. Régularisation de problèmes inverses mal posés : Aspects théoriques et approches numériques, CNEPRU. B01120120033, Projet agrée à partir du : 01/01/2013.

2. Régularisation et Approximation Numérique de certains Problèmes Inverses Mal Posés, CNEPRU. 8/u23/997, Projet agrée à partir du : 01/01/2011.

3. Stabilisation et Approximation numérique de quelques classes de problèmes inverses et mal posés incertains, PNR. B01120090003, Projet agrée à partir du : 01/01/2010.

4. Méthodes analytiques pour la résolution de problèmes mal posés et de systèmes de réaction-diffusion, CNEPRU. B01120090003, Projet agrée à partir du : 01/01/2007.

5. Méthodes fonctionnelles dans l’étude de certaines équations aux dérivées partielles, CNEPRU. B01120060010, Projet agrée à partir du : 01/01/2004

6. Méthodes des inégalités de l’énergie dans l’étude de problèmes abstraits avec des conditions aux limites non locales ou intégrales, CNEPRU. B2301/10/2000, Projet agrée à partir du : 01/01/2000.

• J’ai participé en avril 2009 (en qualité de chercheur associé) au meeting du projet HYDROMED « Hydrologie et problèmes inverses » du programme Euro-Méditerranée 3+3
(Algérie, Espagne, France, Italie, Algérie, Maroc, Tunisie), organisé par l’équipe projet SAGE du centre de recherche INRIA Rennes-Bretagne Atlantique.

Scientific publications

Scientific publications :

35. Bechouat, Tahar, Boussetila, Nadjib, Bağlan, İrem, Lakhdari, Abdelghani and Abdeljawad, Thabet. A regularization–discretization strategy for weakly singular Fredholm integral equations: a Tikhonov–Legendre approach. Open Mathematics, vol. 24, no. 1, 2026, pp. 20250273. https://doi.org/10.1515/math-2025-0273

34. Bechouat, T., & Boussetila, N. (2026). An efficient projected Tikhonov method for large-scale discrete ill-posed problems. International Journal of Computer Mathematics, 1–16. https://doi.org/10.1080/00207160.2026.2672520
https://www.tandfonline.com/doi/full/10.1080/00207160.2026.2672520

33. Bechouat, T., Boussetila, N. & Lakhdari, A. An accelerated iterative regularization scheme for linear ill-posed problems. Calcolo 63, 22 (2026). https://doi.org/10.1007/s10092-026-00697-w
https://link.springer.com/article/10.1007/s10092-026-00697-w

32. Bechouat, Tahar, Boussetila, Nadjib. A regularized Jacobi scheme for first kind Abel integral equation. Comp. Appl. Math. 45, 133 (2026). https://doi.org/10.1007/s40314-025-03574-4
https://link.springer.com/article/10.1007/s40314-025-03574-4

31. Bechouat, Tahar, Boussetila, Nadjib and Patel, Subhashree. "An iteration method with relaxation parameter for solving ill-posed linear operator equations" Journal of Inverse and Ill-posed Problems. https://doi.org/10.1515/jiip-2025-0006
https://www.degruyterbrill.com/document/doi/10.1515/jiip-2025-0006/html?...

30. Besma, Khelili, Nadjib, Boussetila and Abderafik, Benrabah. Tow-parameter quasi-boundary value method for a backward abstract time-degenerate fractional parabolic problem" Journal of Inverse and Ill-posed Problems, vol. 33, no. 2, 2025, pp. 183-206. https://doi.org/10.1515/jiip-2024-0025

29. Abdelghani Lakhdari, Nadjib Boussetila, Thabet Abdeljawad, Abdellatif Ben Makhlouf. On fractional biparabolic inverse source problem. Discrete and Continuous Dynamical Systems - S. doi: 10.3934/dcdss.2024216
https://www.aimsciences.org/article/doi/10.3934/dcdss.2024216

28. Wissame Selmani, Nadjib Boussetila, Mokhtar Kirane and Hamed Alsulami, The modified quasi-boundary-value method for an ill-posed generalized elliptic problem. Advances in Nonlinear Analysis, https://doi.org/10.1515/anona-2024-0036

27. Fares Benabbes, Nadjib Boussetila, Abdelghani Lakhdari, Two regularization methods for a class of inverse fractional pseudo–parabolic equations with involution perturbation, Fractional Differential Calculus, Volume 14, Number 1 (2024), 39–59. doi.org/10.7153/fdc-2024-14-03
https://files.ele-math.com/articles/fdc-14-03.pdf

26. Tahar Bechouat, Nadjib Boussetila. On the numerical solution of weakly singular integral equations of the first kind using a regularized projection method. International Journal of Computer Mathematics (2024), 1–16. https://doi.org/10.1080/00207160.2024.2358119

25. Fares Benabbes, Nadjib Boussetila, Abdelghani Lakhdari, The modified fractional‐order quasi‐reversibility method for a class of direct and inverse problems governed by time‐fractional heat equations with involution perturbation, 13 April 2024
https://doi.org/10.1002/mma.10081
https://onlinelibrary.wiley.com/doi/full/10.1002/mma.10081

24. Sebti Djemoui, Mohamed S. E. Meziani, Nadjib Boussetila, The conditional stability and an iterative regularization method for a fractional inverse elliptic problem of Tricomi-Gellerstedt-Keldysh type. Mathematical Modelling and Analysis, Volume 29, Issue 1, 23–45, 2024.
https://doi.org/10.3846/mma.2024.16783
https://journals.vilniustech.lt/index.php/MMA

23. Bechouat, T., Boussetila, N. Numerical solution of the two-dimensional first kind Fredholm integral equations using a regularized collocation method. Comp. Appl. Math. 42, 267 (2023). https://doi.org/10.1007/s40314-023-02403-w

22. Meziani MSE., Djemoui S., Boussetila N. DETECTION OF SOURCE TERM IN AN ABSTRACT FRACTIONAL SUBDIVISION MODEL BY THE MODIFIED QUASI-BOUNDARY VALUE METHOD WITH A PRIORI AND A POSTERIORI ESTIMATE
EURASIAN JOURNAL OF MATHEMATICALAND COMPUTER APPLICATIONS ISSN 2306–6172
Volume 11, Issue 1 (2023) 98 –123

21. Nadjib Boussetila, Tahar Bechouat. Une variante de la méthode de Projection régularisée pour une
classe d’équations intégrales de Fredholm de première espèce. CARI 2022, Oct 2022, Tunis, Tunisie.
hal-03712841
https://hal.science/hal-03712841/

20. Bechouat Tahar, Boussetila Nadjib, and Rebbani Faouzia, A Variant of Projection-Regularization Method for Ill-Posed Linear Operator Equations
International Journal of Computational MethodsVol. 18, No. 04, 2150008 (2021)
https://doi.org/10.1142/S0219876221500080

19. Mohamed Sief Eddine Meziani; Nadjib Boussetila; Faouzia Rebbani; Abderafik Benrabah, Iterative regularization method for an abstract inverse Goursat problem Volume 7, Issue 2, July 2021, Pages 279-297
10.22034/kjm.2020.237076.1900
https://www.kjm-math.org/article_131345.html

18. Sassane Roumaissa, Boussetila Nadjib, Rebbani Faouzia and Benrabah Abderafik, Iterative regularization method for an abstract ill-posed generalized elliptic equation. https://doi.org/10.1142/S1793557121500698
https://www.worldscientific.com/doi/10.1142/S1793557121500698

17. Abderafik Benrabah, Nadjib Boussetila, Faouzia Rebbani, Modified auxiliary boundary conditions method for an ill‐posed problem for the homogeneous biharmonic equation, Mathematical Methods in the Applied Sciences 2020-01-15 | journal-article DOI: 10.1002/mma.5888
https://onlinelibrary.wiley.com/doi/full/10.1002/mma.5888

16. Sassane Roumaissa, Boussetila Nadjib, Rebbani Faouzia, A variant of quasi‐reversibility method for a class of heat equations with involution perturbation, Mathematical Methods in the Applied Sciences
2020-07-28 | journal-article DOI: 10.1002/mma.6780
https://onlinelibrary.wiley.com/doi/abs/10.1002/mma.6780

15. A. Benrabah, N. Boussetila, Modified nonlocal boundary value problem method for an ill-posed problem for the biharmonic equation, Inverse Problems in Science and Engineering, 2019, Vol. 27,  Issue 3, pp. 340-368.
https://doi.org/10.1080/17415977.2018.1461859
https://www.tandfonline.com/eprint/AH48Qm5Pq5REkdSibzmE/full

14. B. Khelili, N. Boussetila, F. Rebbani, A modified quasi-boundary value method for an abstract ill-posed biparabolic problem, Open Mathematics 2017, 15, pp. 1649–1666.
https://doi.org/10.1515/math-2017-0140<br />
https://www.degruyter.com/view/j/math.2017.15.issue-1/math-2017-0140/mat...

13. A. Benrabah, N. Boussetila, F. Rebbani, Regularization method for an ill-posed Cauchy problem for elliptic equations, Journal of Inverse and Ill-posed Problems 2017, Volume 25, Issue 3, pp. 311–329.
https://doi.org/10.1515/jiip-2015-0075
https://www.degruyter.com/view/j/jiip.2017.25.issue-3/jiip-2015-0075/jii...

12. A. Benrabah, N. Boussetila, F. Rebbani, Regularization of an abstract ill-posed CauchyProblem via general quasi-reversibility method, Applied Sciences, Vol.18, 2016, pp. 1-17. http://www.mathem.pub.ro/apps/v18/A18-be-A68.pdf

11. B. Neggal, N. Boussetila, F. Rebbani, Projected Tikhonov regularization method for Fredholm integral equations of the first kind, Journal of Inequalities and Applications 2016, 2016:195
https://doi.org/10.1186/s13660-016-1137-6
https://journalofinequalitiesandapplications.springeropen.com/articles/1...

10. A. Lakhdari, N. Boussetila, An iterative regularization method for an abstract ill-posed biparabolic problem, Boundary Value Problems 2015, 2015:55.
https://doi.org/10.1186/s13661-015-0318-4
https://boundaryvalueproblems.springeropen.com/articles/10.1186/s13661-0...

9. N. Boussetila, S. Hamida, F. Rebbani, Spectral Regularization Methods for an Abstract Ill-Posed Elliptic Problem, Abstract and Applied Analysis, Volume 2013, Article ID 947379, 11 pages.
http://dx.doi.org/10.1155/2013/947379
https://www.hindawi.com/journals/aaa/2013/947379/citations/

8. A.Bouzitouna, N. Boussetila, F. Rebbani, Two regularization methods for a class of inverse boundary value problems of elliptic type, Boundary Value Problems 2013, 2013:178.
https://doi.org/10.1186/1687-2770-2013-178
https://boundaryvalueproblems.springeropen.com/articles/10.1186/1687-277...

7. A. Benrabah, F. Rebbani and N. Boussetila, A study of the multitime evolution equation with time-nonlocal conditions, Balkan Journal of Geometry and Its Applications, Vol.16, No.2, 2011, pp. 13-24.
http://emis.impa.br/EMIS/journals/BJGA/v16n2/B16-bf.pdf

6. A. Dehici, N. Boussetila, Properties of polynomially Riesz operators on some Banach spaces, Lobachevskii Journal of Mathematics 2011, pp. 32-39.
https://doi.org/10.1134/S1995080211010021.
https://link.springer.com/article/10.1134/S1995080211010021.

5. Boussetila, Nadjib and Rebbani, Faouzia. "A Modified Quasi-Reversibility Method for a Class of Ill-Posed Cauchy Problems" Georgian Mathematical Journal, vol. 14, no. 4, 2007, pp. 627-642. https://doi.org/10.1515/GMJ.2007.627

4. F. Zouyed, F. Rebbani, N. Boussetila, On a Class of Multitime Evolution Equations with Nonlocal Initial Conditions, Abstract and Applied Analysis, Volume 2007, Article ID 16938, 26 pages.
http://dx.doi.org/10.1155/2007/16938
https://www.hindawi.com/journals/aaa/2007/016938/abs/

3. N. Boussetila, F. Rebbani, Optimal regularization method for ill-posed Cauchy problems, Electron. J. Diff. Eqns., Vol. 2006(2006), No. 147, pp. 1-15.
https://ejde.math.txstate.edu/Volumes/2006/147/abstr.html

2. N. Boussetila, F. Rebbani, The modified quasi-reversibility method for ill-posed evolution problems with two-dimensional time. Analytic methods of analysis and differential equations, pp. 15-23, Camb. Sci. Publ., Cambridge, 2006. 978-1-904868-41-X
Edits. A.A.Kilbas and S.V.Rogosin, Belarusian State University, Minsk.Analytic Methods of Analysis and Differential Equations: AMADE 2003.

1. Rebbani F., Boussetila N., Zouyed F. Boundary value problem for a partial differential equation with non-local
boundary conditions // Тр. Ин-та математики НАН Беларуси. – 2001. – 10. – С. 122 – 125.

Scientific conferences

Scientific conferences:

ICIMA 2025 (Hammamet, Tunisia, Dec 2025): Theoretical analysis for some fractional inverse and ill-posed problems.
• ICOFCA 2024 (Sousse, Tunisia, Dec 2024): The modified quasi-boundary value method for a backward abstract time-
degenerate fractional parabolic problem. [Abstract]
• ICMS 2023 (Maltepe University, Turkey, July 5-9, 2023): The modified quasi-boundary value method for an ill-posed gener-
alized elliptic problem.
• CARI 2022 (Tunis, Tunisia, October 2022): Une variante de la méthode de Projection régularisée pour une classe d’équations
intégrales de Fredholm de première espèce.
• ICMS 2019(MaltepeUniversity,Turkey,September4-8,2019): Aniterativeregularizationmethodforanill-posedbi-fractional
problem.
• ICMS 2018 (Maltepe University, Turkey, July 31-August 6, 2018): On the Krylov subspace method for identifying an un-
known source in the heat equation.
• 3rd International Conference on Symmetries, Differential Equations and Applications (Istanbul Technical University,
Turkey, August 14-17, 2017): A modified quasi-boundary value method for an abstract ill-posed biparabolic problem.
• International Congress on Fundamental and Applied Sciences (Yildiz Technical University, Turkey, August 22-26, 2016):
Projected Tikhonov regularization method for Fredholm integral equations of the first kind.
• 19-Annual Conference of the Mathematical Society of Tunisia (Tunisia, March 17-20, 2014): The Q.B.V-Method for an
abstract ill-posed biparabolic problem.
• 6th International Workshop on Differential Equations and Applications (Izmir, Turkey, September 11-14, 2013): Con-
vergence of the Sinc-Collocation Method applied to Fredholm integral equation (with B. Neggal, F. Rebbani).
• KAUST-IAMCS Workshop on Modeling and Simulation of Wave Propagation and Applications (Thuwal, Saudi Ara-
bia, May 8-9, 2012): Deblurring Images via Partial Differential Equations (with F. Rebbani).
• 7th Euro-Maghreb Workshop on Evolution Equations(Annaba,Algeria,May30-June3,2010): Numericalapproximation
by Krylov subspace method for an elliptic inverse problem.
• 6th Maratea Conference FAAT 2009 (Acquafredda di Maratea, Italy, September 24-30, 2009): Regularization methods for
an abstract inverse elliptic problem with Dirichlet conditions (with F. Rebbani, B. Khelili).
• International Conference on Operator Theory (Sousse, Tunisia, February 18-21, 2009): Regularization methods for an
abstract inverse elliptic problem with Dirichlet conditions.
• Inverse Problems: Modeling and Simulations (IPMS)(Ölüdeniz, Fethiye-Turkey, May26-30, 2008): RegularizationMeth-
ods for Simultaneously Determining of Unknown Sources in a Parabolic Equation.
• Annual Conference of the Mathematical Society of Tunisia (SMT) (Sousse, Tunisia, March 17-20, 2008): Regularization
Methods for Simultaneously Determining of Unknown Sources in a Parabolic Equation.
• 3rd International Conference on Mathematical Sciences (ICM 2008) (El Ain, United Arab Emirates, March 3-6, 2008):
The quasi-reversibility method for an abstract hyperbolic equation with two-time Variables (with F. Rebbani).
• 6th ISAAC Congress (Ankara, Turkey, August 13-18, 2007): The quasi-reversibility method for ill-posed elliptic equations
(Session: Inverse and ill-posed problems) (with F. Rebbani).
• Annual Conference of the Mathematical Society of Tunisia (SMT) (Sousse, Tunisia, March 19-22, 2007): An inverse
source problem for a multi-time evolution problem.
• 3rd International Conference “Analytical Methods of Analysis and Differential Equations (AMADE)” (Minsk, Be-
larus, September 13-19, 2006): An inverse source problem in multidimensional evolution equation (with F. Rebbani).
• Annual Conference of the Mathematical Society of Tunisia (SMT) (Hammamet, Tunisia, March 20-23, 2006): On
optimal regularization method for ill posed Cauchy problems (with F. Rebbani).
• International Conference “Dynamical Systems and Applications” (Antalya-Pamukkale, Turkey, July 5-10, 2004): The
quasi-reversibility method for ill-posed ultra-parabolic problems.
• 5th International Conference on Functional Analysis and Approximation Theory (Acquafredda di Maratea, Potenza,
Italy, June 16-26, 2004): A study for an evolution problem with non local initial conditions (with F. Rebbani, A. Benrabah).
• 3rd International Conference AMADE (Minsk, Belarus, September 4-9, 2003): On the modified quasi-reversibility method
for solving ill-posed evolution problem with two-dimensional time (with F. Rebbani).
• The Fifth Jordanian International Congress of Mathematics (FJICM) (Irbid, Jordan, September 3-5, 2002): Quasi-
reversibility method for non local boundary value problem (with F. Rebbani).
• 2nd International Conference AMADE (Minsk, Belarus, February 15-19, 2001): Boundary value problem for a partial dif-
ferential equation with nonlocal boundary conditions (with F. Rebbani).