114 citations · 767 across the 136 of their papers we have counts for
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On self-adjoint boundary conditions for singular Sturm-Liouville operators bounded from below
Fritz Gesztesy, Lance L. Littlejohn, Roger Nichols
We extend the classical boundary values \begin{align*} & g(a) = - W(u_{a}(λ_0,.), g)(a) = \lim_{x \downarrow a} \frac{g(x)}{\hat u_{a}(λ_0,x)}, \\ &g^{[1]}(a) = (p g')(a) = W(\hat…
On Weighted Hardy-Type Inequalities
Chian Yeong Chuah, Fritz Gesztesy, Lance L. Littlejohn +3
We revisit weighted Hardy-type inequalities employing an elementary ad hoc approach that yields explicit constants. We also discuss the infinite sequence of power weighted Birman-H…
The inverse approach to Dirac-type systems based on the -function concept
Fritz Gesztesy, Alexander Sakhnovich
The principal objective in this paper is a new inverse approach to general Dirac-type systems modeled after B. Simon's 1999 inverse approach to half-line Schrödinger operators. In…