• February 2025: Tunisian Academy of Sciences, Lettres, and Arts, One Future: Pour une résilience consciente du vivant face aux défis existentiels .

• December 2024: 6th Euro-Maghreb Conference in Algebra, Geometry and Lie Theory, Hammamet, Tunisia). A proof of the Zariski closure conjecture for coadjoint orbits of exponential Lie groups.

• November 2024: The Graduate School of Mathematical Sciences, Tokyo-Japan). A proof of the Zariski closure conjecture for coadjoint orbits of exponential Lie groups.

• November 2024: Journées d’Analyse Mathématique et Applications: JAMA2024, Hammamet, Tunisia). Estimate of the $L^p$-Fourier transform norm for some Lie groups.

• October 2024 : Association des Enseignants de la FST: Faculty of Sciences of Tunis, Tunisia). La théorie de Lie au service des sciences de la nature.

• Septembre 2024: Laboratoire de Mathématiques Blaise Pascal, UMR 660, Clermont-Ferrand, France). About the Zariski Closure Conjecture for exponential Lie groups.

• July 2024: GTT – Geometry and Topology in Tunisia III, Tunis, Lac II. Toward the resolution of the Zariski closure conjecture for exponential Lie groups.

• June 2024 : Algebra and Deformations, Université de Haute-Alsace, Mulhouse. In honor of Professor Abdenacer Makhlouf for his 60th birthday. A proof of the Zariski Closure Conjecture of exponential solvable groups.

• May 2024: Samarkand State University, Department of Mathematics, Uzbekistan. Harmonic Analysis and Lie groups, an overview on Analysis, Algebra, and Geometry.

• March 2024: First International Conference of Harmonic Analysis and Applications, Casablanca, Morocco. Estimate of the $L^p$-Fourier transform norm for compact extensions of locally compact groups.

• January 2024: International Conference of Mathematics and Applications ICMA2024, Mata Sundri College of Women: University of Delhi, India). Polynomial conjectures for unitary representations of a nilpotent Lie group.

• December 2023 : 18th Discussion Meeting in Harmonic Analysis. In honor of the centenary year of Harish Chandra, Department of Mathematics, IIT Guwahati India. The polynomial Conjecture for monomial representations of discrete type of an exponential solvable Lie group.

• December 2023: Department of Mathematics, University of Delhi, India). The $L^p$-Fourier transform norm for some Lie groups.

• November 2023: 7th Tunisian-Japanese Conference: “Geometric and Harmonic Analysis on Homogeneous Space and Applications“, Monastir, Tunisia. On polynomial Conjectures for nilpotent Lie groups unitary representations.

• September 2023: OCAMI workshop: Representation Theory and Differential Geometry on homogeneous spaces, Osaka Metropolitan University, Japan): The Zariski Closure Conjecture of coadjoint orbits of exponential solvable groups.

• July 2023: Guest Lecture and Research Sharing Representation Theory of Lie Groups and Its Applications,  Universitas Padjadjaran, Bandung, Indonesia. Representation Theory of Lie Groups and Differential Geometry.

• July 2023: The 9th SEAMS-UGM 2023 International Conference on Mathematics and Its Applications, Indonesia. On polynomial Conjectures for nilpotent Lie groups unitary representations.

• June 2023: Research Seminar “Differential geometry and Analysis: Philipps Universität Marburg Allemagne. Deformation of Discontinuous groups acting on Homogeneous Spaces.

• May 2023: Harmonic Analysis and PDEs: Université Félix Houphouët-Boigny – Abidjan Côte d’Ivoire. The $L^p$-Fourier transform norm for some Lie groups.

• April 2023: Euro-Maghreb Conference in Algebra, Geometry and Lie Theory, Sousse, Tunisia. On polynomial Conjectures for nilpotent Lie groups unitary representations.

• March 2023: RGOSA online seminar: Research Group on Ordered Structures with Applications. On polynomial Conjectures for nilpotent Lie groups unitary representations.

• March 2023: Tottori University, Japan. On polynomial Conjectures for nilpotent Lie groups unitary representations.

• February 2023: Public Authority for Applied Education and Training (PAAET), Kuwait). Switching from commutative to non-commutative harmonic analysis and Lie groups interpretation.

• Novembre 2022: Univ. du Littoral Côte d’Opale Calais, France. GDR Renormalisation Annual Meeting 2022 (In honor of Dominique Manchon): Frobenius Exponential Lie algebras and Zariski Closure Conjecture: A longstanding work with Dominique Manchon.

• Novembre 2022 (Hammamet, Tunisia): Journées Analyse Mathématique et Applications 2022 (In honor of Mohamed Sifi). The $L^P$-Fourier transform norm for some compact extensions of Lie groups.

• September 202: Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Indonesia: Online seminar. Estimate of the $L^p$-Fourier transform norm on certain locally compact groups.

• September 2022 (Tokyo University, Japan): Geometry, Analysis, and Representation Theory of Lie Groups (by the occasion of the 60th birthday of Toshiyuki Kobayashi). A Collaboration with Toshiyuki Kobayashi, Fruitful present and Thriving future.

• August 2022 : Université Marien Ngouabi, Brazzaville, Congo. On polynomial conjectures for nilpotent Lie groups unitary representations.

• June 2022: (Reims University, France), Symmetry in Geometry and Analysis (In honor of the 60th birthday of Toshiyuki Kobayashi). On the polynomial conjecture for restrictions of nilpotent Lie groups representations.

• March 2022 (Mahdia, Tunisia), 25th Meeting of the Tunisian Mathematical Society. A proof of the polynomial conjecture for restrictions of nilpotent Lie groups representations.

• February 2022 (Indian Institute of Science, Bangalore, India): Analysis and Probability Research Group (APRG). The $L^p$-Fourier transform norm on compact extensions of locally compact groups.

• December 2021 (Hansraj College, India), Online International Conference on Recent Trends in Mathematics. The $L^p$-Fourier transform norm on compact extensions of locally compact groups.

• July 2020 (Tunis): GTT 1: Geometry and Topology in Tunisia I . Est-ce que la géométrie des orbites coadjointes serait derrière une preuve de la conjecture polynomiale des restrictions nilpotentes?

• October 2019 (Errachidia, Morocco), Workshop on Harmonic Analysis and Integral Geometry with Applications. Sharpness problems related to some uncertainty principles on nilpotent Lie groups.

• July 2019 (Winnipeg, Canada): Banach Algebra 2019: Some uncertainty principles on nilpotent Lie groups (in memory of Eberhard Kaniuth).

• April 2019 (New York University Abu Dhabi, UAE): Some problems related to Fourier analysis on solvable Lie groups and their compact extensions.

• April 2019 (American University of Sharjah, UAE. Department of Mathematics and Statistics). Branching laws of some unitary representations of exponential Lie groups and related differential operators algebras.

• April 2019 (Marrakech, Morocco, In memory of Ahmad Intissar). Harmonic analysis around monomial representations of exponential Lie groups.

• February 2019: Graduate School of Mathematics, Nagoya, Japan). Harmonic analysis on monomial representations of exponential Lie groups and a counterexample to Duflo’s Conjecture.

• December 2018 (Faculty of Mathematics, Kyushu University, Japan): Müntz-Szàsz analogues for some compact extensions of nilpotent Lie groups.

• December 2018: Graduate School of Mathematical Sciences, University of Tokyo. Monomial representations of discrete type and differential operators.

• October 2018 : Laboratoire de Mathématiques Blaise Pascal, Clermont-Ferrand. Représentations monomiales des groupes de Lie exponentiels et opérateurs différentiels.

• October 2018: Journées SL2(R) à Reims. Does “ax+b” stand for the solvable analogue of SL2(R) in deformation theory ?

• October 2018 : Metz, Université de Lorraine, France. C’est quoi l’analogue du Théorème de Müntz-Szász pour un groupe de Lie? Théorie de Lie, Géométrie et Analyse (Lie GA).

• October 2018 : IHES, PARIS-SACLAY, https://www.ihes.fr/). On the deformation theory of discontinuous groups acting on solvable homogeneous spaces.

• September 2018 : Rabat, Morocco. Académie Hassan II des Sciences et Techniques: Mathématiques, Applications et Interactions avec la Physique: Quelques propriétés de la transformée de Fourier sur certains groupes de Lie.

• June 2018: 20-23, University of Haute Alsace, Mulhouse, France. Algebra and Lie Theory Conference: Monomial representations of discrete type and differential operators.

• May 2018: Casablanca, Morocc, Harmonic Analysis and Integral Geometry: A full generalized version of Hardy’s Theorem on nilpotent Lie groups.

• March 2018: TEM2018: Ibn Tofail, Kenitra Morocco. On the L^p Fourier Transform on some Lie groups.

• February 2018: The Tunisian Academy of Sciences, letters and Arts: Beit al HikmaTunisian Academy of Sciences, Letters and Arts: Beit Elhikma. L’infini.

• January 2018: Bilbao, Spain. Some uncertainty principales on solvable Lie groups and their compact extensions.

• July 2017: Oberwolfach, Germany. On the Lp-Fourier transform norm for some solvable Lie groups and their compact extensions.

• January 2017 (Tottori, Japan): Monomial representations of discrete types for certain exponential Lie groups.

• September 2016 (Tsukuba, Japan): Hardy’s theorem on Lie groups.

• February 2016 (Tsukuba, Japan): Some uncertainty principles on certain Lie groups.

• December 2015 (New Delhi): Estimate of the Lp-Fourier transform norm on certain Lie groups.

• August 2015 (Halifax, Canada): On the Lp-Fourier transform norm on some Lie groups.

• January 2015 (Hammamet, Tunisia): On the Fourier transform on some Lie groups.

• December 2014 (Marrakech, Morocco): On the Lp-Fourier transform norm on some Lie groups.

• February 2014 (Kyushu, Japan): On the theory of deformation of discontinuous actions on homogeneous spaces.

• February 2014 (Tsukuba): On the Fourier transform on some Lie groups.

• Mai 2013 (Granada, Spain): On the $L^p-$Fourier transform norm on some Lie groups.

• April 2013 (Clermont-Ferrand, France) : Sur les representations de type discret des groups de résolubles exponentials.

• January 2013(Kyushu, Japan): Harmonic analysis on monomial representations of discrete type of exponential solvable Lie groups.

• December 2012 (Sousse):  Harmonic analysis on monomial representations of exponential solvable Lie groups.

• November 2012 (Tokyo): Some aspects of the deformation theory of discontinuous subgroups of solvable homogeneous spaces.

• November 2012 (Tokyo): On the geometry of discontinuous subgroups acting on solvable homogeneous spaces.

• October 2012 (Nice, France): On the geometry of discontinuous subgroups acting on homogeneous spaces.

• September 2012 (MIMS, Tunis): The theory of discontinuous subgroups acting on homogeneous spaces.

• March 2012 (HRI, India): The representation theory of nilpotent Lie groups. (Four lectures)

• June 2011 (China): Some uncertainty principles on certain Lie groups.

• June 2011 (Luxembourg): Estimate of the Fourier transform norm on some Lie groups.

• July 2010 (Oulou, Finland): On sharpness problems of some uncertainty principles on nilpotent Lie groups.

• March 2010 (SMT, Sousse): Some uncertainty principles on solvable Lie groups.

• December 2009 (Taiwan): The Plancherel Theorem of monomial representation of exponential discrete type.

• July 2009 (Casablanca, Morocco): Sur certains principes d’incertitude pour les groupes de Lie nilpotents.

• April 2009 (Kénitra, Morocco): Description de l’espace de deformation des actions des groupes discontinus.

• February 2009 (Kyushu, Japan): Rigidity property of deformations on nilpotent Lie groups.

• November 2008 (Atami, Japan):  The deformation spaces of the action of discontinuous groups acting on solvable homogeneous spaces.

• November 2008 (Luminy, Marseille): The deformation spaces of the action of discontinuous subgroups acting on solvable homogeneous spaces.

• August 2008 (Bangalore, India) (two lectures): General Uncertainty principles on solvable Lie groups.

• June 2008 (Elescorial, Spain): On Hardy’s Theorem on connected nilpotent Lie group.

• April 2008 (Paderborn, Germany): Deforming discontinuous subgroups on homogeneous spaces.

• December 2007 (Hong-Kong): Deformation spaces of an action of discontinuous subgroups on nilpotent homogebeous spaces.

• November 2007 (Dijon, France): Harmonic Analysis on monomial representations of a nilpotent Lie groups.

• September 2007 (Metz, France): Harmonic Analysis on monomial representations of a nilpotent Lie groups.

• May 2007 (Oujda, Morocco): Opérateurs d’entrelacement des representations monomiales des groupes de Lie nilpotents.

• February 2007 (RIMS-Kyoto, Japan): Some uncertainty principles on nilpotent Lie groups.

• February 2007 (Kyushu, Japan): “Proper and weak proper actions on solvable homogeneous spaces.

• December 2006 (Dijon, France): Actions faiblement propres sur les espaces homogènes résolubles.

• September 2006 (Clermont-Ferrand, France): Actions faiblement propres sur les espaces homogènes exponentiels.

• July 2006 (Istanbul, Turkey): Weak proper actions on solvable homogeneous spaces.

• April 2006 (Paderborn, Germany): The Cowling-Price Theorem on 2-NPC nilpotent Lie groups.

• June 2005 (Kiel, Germany): Some uncertainty principles on NPC nilpotent Lie groups.

• May 2005 (Dijon, France): Sur les actions propres sur les espaces homogènes nilpotents.

• April 2005 (Munich, Germany): Some uncertainty principles on NPC nilpotent Lie groups.

• November 2004 (Awajishima, Japan): Weak proper actions on exponential homogeneous spaces.

• July 2004 (Istanbul, Turkey): Differential Operators on the space of a Restricted Representation on Nilpotent Lie groups.

• June 2004 (Escorial, Spain): Some Uncertainty principles and Harmonic Analysis on Nilpotent Lie Groups.

• December 2003 (Clermont Ferrand, France): Le Théorème de Cowling-Price sur les groupes de Lie Nilpotents.

• October 2003 (Luxembourg): Le Théorème de Cowling-Price sur les groupes de Lie Nilpotents.

• September 2003 (Sfax, Tunisia): Troisièmes Journées d’Analyse harmonique : Sur Certains Principes d’incertitude sur les groupes de Lie Nilpotents.

• September 2003 (Munich, Germany): GSF-International workshop on Uncertainty priciples. GSF-International workshop on Uncertainty priciples: Some Uncertainty principles on Nilpotent Lie Groups.

• August 2003 (Edmonton, Canada): Banach Algebra 2003: The Cowling-Price Theorem for Nilpotent Lie Groups.

• February 2003 (Vienna, Austria): International workshop on Idempotent Mathematics and dequantization. “Dequantization of coadjoint orbits: Moment sets and Characteristic varieties.

• December 2002 (Clermont Ferrand, France): Multiplicités des Représentations mixtes des groupes de Lie complètement résolubles.

• August 2002 (Bejing, China): International Congress of Maths, ICM 2003: Differential operators on the space of restricted representations on nilpotent Lie groups.

• October 2001 (Metz, France): Commutativité des sous-algèbres dans l’algèbre enveloppante d’un groupe de Lie nilpotent.

• October 2001 (Nancy, France): Estimation de la norme de la transformée de Fourier Lp sur les groupes de Lie nilpotents.

• October 2001 (Luxembourg): Estimation de la norme de la transformée de Fourier Lp sur les groupes résolubles.

• March 2001 (Hammamet, Tunisia): SMT 2001 : Analyse Harmonique sur les Espaces homogènes Exponentiels.

• August 2000 (Odense, Danemark): European School in Group Theory and Plancherel Formula: The Penney-Fujiwara-Plancherel Formula of Nilpotent Lie Groups.

• July 2000 (Vigo, Spain): First Colloquim on Lie Theory and applications: Harmonic Analysis on Some Exponential Solvable Homogeneous Spaces.

• July 2000 (Barcelone, Spain): European Congress of Mathematics: Differential Operators on the Space of a Unitary Representation of Exponential Lie Groups.

• February 2000 (Monastir, Tunisia): Opérateurs Différentiels sur l’espace de la restriction d’une représentation unitaire d’un groupe de Lie résoluble exponentiel.

• April 1999 (Saint-Louis, U.S.A): The Department of Mathematics and Computer Science. The University of Saint Louis at Missouri.

• April 1999 (Las Vegas, U.S.A): Sectional Meeting of the American Mathematical Society, Las Vegas (U.S.A): Generalized Moment Sets and Unitary Representations of Exponential Solvable Lie Groups.

• March 1999 (Tabarka, Tunisia): Colloque de la Société Mathématique de Tunisie: Frobenius reciprocity and differential operators on certain solvable homogeneous spaces.

• June 1998 (Leiden, Pays Bas): Leiden University, The Netherlands, ESGT 98/ European School in Group Theory: Harmonic Analysis for Certain Monomial Representations of an Exponential Solvable Lie Group.

• February 1998 (Paris, France): Paris 7, Jussieu : Analyse harmonique sur les espaces homogènes exponentiels.

• June 1997 (Poitiers, France): Colloque en l’honneur de Pierre Bernat, Université de Poitiers : Séparation des représentations unitaires des groupes de Lie nilpotents.

• February 1997 (Luxembourg): Centre Universitaire de Luxembourg : Analyse multirésolution, bases orthonormées et bases de Riesz.

• June 1996 (Metz, France): Colloque Metz-Nancy-Strasbourg : Sous-groupes de Kazdhan et moyennes invariantes sur la sphère.

• October 1995 (Luxembourg): Centre Universitaire de Luxembourg : Méthode d’orbites et désintégration des représentations unitaires des groupes de Lie nilpotents

• August 1994 (Moscou, Russia): Participation au Congrès International de Mathématiques à Moscou organisé par l’International Sophus Lie Centre et la Russian Independant University : On the cortex of two and three steps nilpotent Lie groups.

• March 1994 (Monastir, Tunisie): Deuxième Colloque de la Société Mathématique de Tunisie : Opérateur d’entrelacement des représentations monomiales des groupes de Lie nilpotents.