- Invited Talk "International Conference of Computing ICC2009" (April 2 - 4, 2009, California State U., Fullerton, USA)

- A Talk at Applications of Computer Algebra (ACA, 2009, ETS, Montreal, QC, Canada

- Invited Speaker "4th World Conference On 21st Century Mathematics 2009" (March 4-8, 2009, Lahore-Pakistan)

- Invited Talk at Applied Mathematics and Computation (Aug. 12-18, 2008, Plovdiv, Bulgaria)

- A Talk at Second Canada-France Congress (May 31 - June 5, 2008, Montreal, Canada)

- Invited Talk at Applied Mathematics and Computation (Aug. 12-18, 2007, Plovdiv, Bulgaria)

- A Talk at Applications of Computer Algebra (ACA July 31 - Aug3, 2005, Nara Women's University, Nara, Japan )

- A Talk at Mathematics of Information Technology and Complex Systems (MITACS May 13, 2005, University of Calgary, Alberta, Canada)

- A Talk at Mathematics of Computer Algebra and Analysis (MOCAA May 11, 2005, University of Calgary, Alberta, Canada

- A Talk at Mathematics of Computer Algebra and Analysis (MOCAA 2004, University of Waterloo, Ontario, Canada)

**Posters**

Unified Formulas For Arbitrary Order Symbolic Derivatives and Anti-Derivatives ofThe Power-Inverse Hyperbolic Class I, Austria, 2008.

The Mittag-Leffler Theorem and The nth Derivative of Meromorphic Functions, Waterloo, ON., Canada, 2007.

ISSAC 2005 (Beijing, China)

ECCAD, 2004 (Wilfrid Laurier University, Waterloo, Ontario, Canada )

ECCAD, 2001 (Tallahassee, Florida, USA)

MITACS, 2001 (Montreal, Quebec, Canada)