3 papers
math.AP2014
Stability of square root domains associated with elliptic systems of PDEs on nonsmooth domains
Fritz Gesztesy, Steve Hofmann, Roger Nichols
We discuss stability of square root domains for uniformly elliptic partial differential operators in , with mixed boundary conditions on…
math.FA2014
A Jost-Pais-type reduction of (modified) Fredholm determinants for semi-separable operators in infinite dimensions
Fritz Gesztesy, Roger Nichols
We study the analog of semi-separable integral kernels in of the type $$ K(x,x')=\begin{cases} F_1(x)G_1(x'), & a<x'< x< b, \\ F_2(x)G_2(x'), & a<x<x'<b, \end{cases}…
math.SP2012
Boundary Data Maps and Krein's Resolvent Formula for Sturm-Liouville Operators on a Finite Interval
Stephen Clark, Fritz Gesztesy, Roger Nichols +1
We continue the study of boundary data maps, that is, generalizations of spectral parameter dependent Dirichlet-to-Neumann maps for (three-coefficient) Sturm-Liouville operators on…