2011

Co-organizer:

Mathematical Biology
An invited session in
the 2011 Canadian Mathematical Society Winter Meeting
Ryerson University
December 10 - 12, 2011, Toronto, Ontario, Canada

2009

Organizer:

Nonlinear Analysis and Differential Equations
A minisymposium of
The 30^th annual meeting of the
Canadian Applied and Industrial Mathematics Society (CAIMS)
University of Western Ontario
June 10-14, 2009, London, Ontario, Canada

2008

Co-Organizer:

Nonlinear Boundary Value Problems
A special session in
The 6^th International Conference On
Differential Equations and Dynamical Systems
May 22-26, 2008, Baltimore, Maryland, USA

2008

Co-Organizer:

Topological Methods for Boundary Value Problems
A special session in
The 7^th AIMS International Conference On
Dyn. Systems, Diff. Equations and Applications
May 18 - 21, 2008, Arlington, Texas, USA

2006

Co-Organizer:

Topological Methods for Boundary Value Problems
A special session in
AIMS' Sixth International Conference on
Dynamical Systems, Differential Equations, and Applications
University of Poitiers, Poitiers
June 25 - 28, 2006, (2 hours by train from Paris) France

2005

Invited Lecture:

Conference On
Differential Difference Equations and Applications
Florida Institute of Technology
August 1-5, 2005, Melbourne, Florida, USA

2004

Co-Organizer:

Topological Methods for Boundary Value Problems
A special session in
Fifth International Conference on
Dynamical Systems and Differential Equations
June 16-19, 2004, California State Polytechnic University, Pomona, CA, USA

2002

Co-Organizer:

Topological Methods for Boundary Value Problems
A special session in
Fourth International Conference on Dynamical Systems and Differential Equations
Wilmington, NC, U.S.A, May 24-27, 2002

Invited Lectures:

1. Fourth World Congress of Nonlinear Analysts WCNA-2004
   June 30-July 7, 2004
   Hyatt Grand Cypress Resort
   Orlando, Florida, USA


2. ICCAM 2004: Eleventh International Congress on Computational and Applied Mathematics
   Katholieke Universiteit, Leuven, Belgium
   July 26-July 30, 2004

Other invited and contributed talks (1991-2002)

A fixed point theorem for multivalued maps and applications
Invited talk delivered at Fourth ISAAC Congress, York University, Canada, August 11-16, 2003

An intersection theorem for KKM maps and applications
Invited talk delivered at The 3th annual McMaster Optimization Conference: Theory and Applications(MOPTA03), McMaster University, Canada, July 30-August 1, 2003

Multiple positive solutions of higher order boundary value problems
Contributed talk at 2002 Winter Meeting of Canadian Mathematics Society(CMS), Univetsity of Ottawa, Canada

Multiple positive solutions of three-point boundary value problems with singularities
Invited talk delivered at the Americas V, University of Alberta, Canada, July, 7-12, 2002

Multiple positive solutions of conjugate boundary value problems with singularities
Invited talk delivered at the Fourth International Conference on Dynamical Systems and Differential Equations, Wilmington, NC, USA, May 24-27, 2002

Travelling wavefronts of scalar reaction-diffusion equations with and without delays
Invited talk delivered at the 957th AMS Meeting, University of Toronto, Ontario, Canada, 2000

Multiple positive solutions of Hammerstein integral equations with singularities
Invited talk delivered at the 2000 International Conference on Dynamical Systems and Differential Equations, Atlanta, U.S.A. May 18-21, 2000

New variational inequalities for monotone maps
Invited talk delivered at the Second World Congress of Nonlinear Analysts, Athens, Greece 1996

Existence and uniqueness theorems of coupled fixed points and applications
Invited talk delivered at the First World Congress of Nonlinear Analysts, Tampa, U.S.A. 1991