 12th Conference of the International Linear Algebra Society at Regina,
Canada (July 2005) 
 11th Conference of the International Linear Algebra Society at Coimbra,
Portugal (July 2004) 
 Joint Mathematics Meeting at Phoenix (January 2004) 
 Joint Mathematics
Meeting at Baltimore (January 2003)
 Left eigenvalues of a quaternionic Matrix 

 CSU Hayward Colloquium (January 18, 2002)
 Matrices and Graphs: a twoway street 

 Joint Mathematics
Meeting at San Diego (January 2002)
 On preserving structured matrices using double bracket operators 

 Past presentations (before 2002) 