• Invited Speaker, “ Weighted Hardy type inequalities with Robin Boundary Conditions”, International Conference on “PDEs and Semigroups in Applied Analysis” on the occasion of Jerry Goldstein’s 80th birthday, Bari, July 12-15, 2021.
• May 2017, Keynote Speaker, “Recent Results on Weighted Hardy and Rellich Inequalities on Manifolds”, International Conference on Mathematics and Mathematics Education, Harran University, Urfa.
• July 2008, ”Improved Hardy and Rellich inequalities on Riemannian manifolds”, WCNA 2008, Orlando, Florida.
• May 2008, ”The Hardy inequality and Nonlinear parabolic equations on Carnot groups”, 7th AIMS International Conference on Dynamical Systems, Differential Equations and Applications, The University of Texas at Arlington, Arlington, Texas.
• Jan. 2007, “Rellich type inequality on Carnot Groups”, AMS and MAA Joint Meeting, New Orleans, Louisiana.
• Dec. 2006,“The Hardy inequality and Nonlinear parabolic equations on Carnot groups”, The 5 th International Conference on Differential Equations and Dynamical Systems, Edinburg, Texas.
• Mar. 2006,“Hardy, Rellich and Uncertainty principle inequalities on Carnot groups”, The University of Texas , Arlington, Texas.
• Mar. 2006,“Sharp weighted Hardy-type inequalities, uncertainty principle and Rellich inequalities on Carnot groups”, The University of Oklahoma, Norman, OK.
• Jan. 2006, “Sharp Hardy-type inequalities and uncertainty principle inequality on Carnot Groups” AMS and MAA Joint Meeting, San Antonio, Texas.
• Oct. 2004, “ Doubly nonlinear parabolic equations with singular lower order term on the Heisenberg group” Analysis and Geometry in Carnot-Caratheodory spaces, AMS Fall Western Section Meeting , University of New Mexico, Albuquerque, New Mexico.
• Apr. 2004, “Nonlinear parabolic partial differential equations with singular lower order term”, The University of Texas-San Antonio, San Antonio, Texas.
• Mar. 2004, “Nonlinear partial differential equations on the Heisenberg group”, North Dakota State University, Fargo, North Dakota.
• Feb. 2004, “Modified filtration equation with singular potential”, The University of Texas-Pan American, Edinburg, Texas.
• Jan. 2004, “Nonlinear parabolic equations with the singular lower order term”, Joint Mathematics Meetings, Phoenix, AZ.
6• Sep. 2003, “Nonlinear degenerate differential equations with singular lower order term on the Heisenberg group”, University of Missouri, Columbia, Missouri.
• Sep. 2003, “Doubly nonlinear parabolic equations with singular lower order term”, The University of Missouri, Columbia, Missouri.
• May 2003, “The linear heat equation with a highly oscillating potential”, Northern State University, Aberdeen, South Dakota.
• Mar. 2003, “Instantaneous blow up” , Purdue University, IN.