12 citations · 22 across the 6 of their papers we have counts for
13 papers
Extremal Non-Compactness of Composition Operators with Linear Fractional Symbol
Estelle L. Basor, Dylan Q. Retsek
We realize norms of most composition operators acting on the Hardy space with linear fractional symbol as roots of hypergeometric functions. This realization leads to simple necess…
On the asymptotics of certain Wiener-Hopf-plus-Hankel determinants
Estelle L. Basor, Torsten Ehrhardt
In this paper we determine the asymptotics of the determinants of truncated Wiener-Hopf plus Hankel operators as tends to infinity for symbols $a(x)=(x…
Factorization of a class of Toeplitz + hankel operators and the A_p-condition
Estelle L. Basor, Torsten Ehrhardt
Let be the Toeplitz plus Hankel operator acting on $H^p(\T)$ with generating function $ϕ\in L^\iy(\T)$. In a previous paper we proved that is invertible if…
Toeplitz Determinants From Compatibility Conditions
E. Basor, Y. Chen
In this paper we show, how a straightforward and natural application of a pair of fundamental identities valid for polynomials orthogonal over the unit circle, can be used to calcu…
On the Determinant of a Certain Wiener-Hopf + Hankel Operator
Estelle L. Basor, Torsten Ehrhardt, Harold Widom
We establish an asymptotic formula for determinants of truncated Wiener-Hopf+Hankel operators with symbol equal to the exponential of a constant times the characteristic function o…
The X-ray problem revisited
Estelle L. Basor, Yang Chen
In this letter we re-visit the X-ray problem. Assuming point interaction between the conduction electrons and the first instantaneously created core-hole, the latter's Green's func…