L. Littlejohn

activity

20112026

most citedSpectral analysis for the exceptional

X_{m}

-Jacobi equation

12 citations · 38 across the 23 of their papers we have counts for

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3 papers · 1 filter

math.FA2026

A New Characterization of the Domains of Integral Powers of the Self-Adjoint Friedrichs-Legendre Operator

Lance Littlejohn, Richard Wellman, Quinn Wicks

Let $A$ be the self-adjoint operator in $L^{2} (- 1, 1)$ , generated by the second-order classical Legendre differential equation% \[ \ell\lbrack y](t)=-\left( (1-t^{2})y^{\prime}(t)\r…

math.FA2021

The Krein-von Neumann extension revisited

Guglielmo Fucci, Fritz Gesztesy, Klaus Kirsten +3

We revisit the Krein-von Neumann extension in the case where the underlying symmetric operator is strictly positive and apply this to derive the explicit form of the Krein-von Neum…

math.FA2017

Self-Adjoint Operators in Extended Hilbert Spaces $H \oplus W$ : An Application of the General GKN-EM Theorem

Lance Littlejohn, Richard Wellman

We construct self-adjoint operators in the direct sum of a complex Hilbert space $H$ and a finite dimensional complex inner product space $W$ . The operator theory developed in this…

A New Characterization of the Domains of Integral Powers of the Self-Adjoint Friedrichs-Legendre Operator

The Krein-von Neumann extension revisited

Self-Adjoint Operators in Extended Hilbert Spaces H⊕W: An Application of the General GKN-EM Theorem

Self-Adjoint Operators in Extended Hilbert Spaces $H \oplus W$ : An Application of the General GKN-EM Theorem