1) A. Razani, The impact of noncommutativity on the dynamics of quantum systems and the sub-Laplacian operator, International Conference on Advances in Mathematics and its Applications 2024 (ICAMA 2024), Manipur University, December 06-07, 2024.
2) A. Razani, A quantum approach to the Laplace operator, Istanbul Bilgi Universitesi, July 31-August 2, 2024.
3) A. Razani, Quantization of Laplacian on graded Lie groups, Institute for Resaerch in Fundamental Sciences (IPM), Tehran, Iran, June 20, 2024.
4) A. Razani, Quantum Laplacian: Uncertainty Principal Approach, Amirkabir University of Technology, Tehran, Iran, March 17, 2024.
5) A. Razani, Some visions of Laplacian and its applications, Mersin University, Mersin, Turkey, December 13, 2023.
6) A. Razani, Image processing and polytropic equation, 5th seminar on nonlinear analysis and optimization (SNAO2022), Azarbaijan Shahid Madani University, Tabriz, Iran, May 29-30, 2022.
7) A. Razani, From Laplace operator to Lane-Emden equation , 14th Summer Workshop in Mathematics, Department of Mathematics, University of Brasilia, Brasilia, Brazil, January 17-21, 2022.
8) A. Razani, Some aspects of the Laplace operator, 27th International Conference of International Academy of Physical Sciences on Functional and Numerical Analysis (CONIAPS XXVII), School of Studies in Mathematics, Pt. Ravishankar Shukla University, Raipur, India, October 26-28, 2021.
9) A. Razani, Laplace and p-Laplace problems, The 15th Seminar on Differential Equations and Dynamical Systems, University of Guilan, Rasht, Iran, March 6-7, 2021.
10) A. Razani, Weak solutions for a Neumann nonlocal problem, International e-Conference on Nonlinear Analysis and its Applications (e-ICNAA2020), Dayanand Science College, India, July 27-29, 2020.
11) A. Razani, Brouwer's Fixed Point Theorem and a cup of coffee, University of Manitoba, Winnipeg, Canada, June 7, 2019.
12) A. Razani, An existence result for the extended Majda's model, University of Manitoba, Winnipeg, Canada, November 1, 2018.
13) A. Razani, Existence of periodic solution for coupled matrix Riccati's differential equations, Islamic Azad University, Ahvaz Branch, Ahvaz, Iran, Feb. 1-3, 2017.
14) A. Razani, The study of detonation waves, University of Kurdistan, Sanandaj, Iran, 2 November 2016.
15) A. Razani, On the existence of a period solution of the Riccati differential equation, University of Oulu, Oulu, Finland, 22 August 2011.
16) A. Razani, Some fixed point theorem in cone and modular metric spaces}, Functional analysis and its applications, June 16-18, 2009, University of Nis, Nis, Serbia.
17) A. Razani, Some applications of Schauder's fixed point theorem in ordinary differential equations, Seminario de Analisis No Lineal Anuncio de Conferencia, 1 de julio de 2008, Grupo de Analisis No Lineal de la Universidad de Sevilla, Sevilla, Spain.
18) A. Razani, Some fixed point theorems in modular spaces and an application, Seminario de Analisis No Lineal Anuncio de Conferencia, 8 de julio de 2008, Grupo de Analisis No Lineal de la Universidad de Sevilla, Sevilla, Spain.
19) A. Razani, A survey of shock wave in combustion, Wolfgang Pauli Institute (WPI), Vienna, Austria, 28 April 2005.
20) A. Razani, Shock structure in a combustion model, Partial Differential Equations in Mathematical Physics, in memory of Olga A. Ladyzhenskaya, Centro Internazionale per la Ricerca Matematica (CIRM) (Levico Terme (Trento) Italy, October 24-30, (2004).