Is polynomial interpolation in the monomial basis unstable?

Seminar: 
Applied Mathematics
Event time: 
Wednesday, April 5, 2023 - 1:00pm
Location: 
AKW 200
Speaker: 
Zewen Shen
Speaker affiliation: 
University of Toronto
Event description: 

In this talk, we will show that the monomial basis is generally as good as a well-conditioned polynomial basis for interpolation, provided that the condition number of the Vandermonde matrix is smaller than the reciprocal of machine epsilon. We will also show that the monomial basis is more advantageous than other polynomial bases in a number of applications.