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Adjoint Linear Differential OperatorsWilliam T. Reid · Transactions of the American Mathematical Society · 1957
The Expansion Theorem For Singular Self-Adjoint Linear Differential OperatorsNorman Levinson · Annals of Mathematics (Second Series) · 1954
Spectral properties of not necessarily self-adjoint linear differential operatorsBernd Schultze · Advances in Mathematics · 1990
A continuum of unusual self-adjoint linear partial differential operatorsW.N. Everitt; L. Markus; M. Muzzulini; M. Plum · 2007
Stability Theory and Adjoint Operators for Linear Differential-Difference EquationsRichard Bellman and Kenneth L. Cooke · Transactions of the American Mathematical Society · 1959
Stability theory and adjoint operators for linear differential-difference equationsBellman, Richard; Cooke, Kenneth L. · Transactions of the American Mathematical Society · 1959
Exact Values of Bernstein-Widths for Some Classes of Periodic Functions with Formal Self-Adjoint Linear Differential OperatorsGuo, Feng · Journal of Inequalities and Applications · 2008
Adjointness in Nonadjoint Boundary Value ProblemsZettl, Anton · SIAM Journal on Applied Mathematics · 1969
Adjointness in Nonadjoint Boundary Value ProblemsAnton Zettl · SIAM Journal on Applied Mathematics · 1969
Shorter Notes: Factorization of Differential OperatorsAnton Zettl · Proceedings of the American Mathematical Society · 1971
A constructive characterization of disconjugacyZettl, Anton · Bulletin of the American Mathematical Society · 1975
PERTURBATION OF THE LIMIT CIRCLE CASEZETTL, ANTON · The Quarterly Journal of Mathematics · 1975
The Friedrichs Extension of Singular Differential OperatorsMarco Marletta; Anton Zettl · 2000
The Sturm-Liouville Friedrichs extensionYao, Siqin; Sun, Jiong; Zettl, Anton · Applications of Mathematics · 2015
A Vanishing Theorem for CohomologyJ. L. Alperin and Daniel Gorenstein · Proceedings of the American Mathematical Society · 1972
Inversion of an Integral TransformHarry Pollard and Harold Widom · Proceedings of the American Mathematical Society · 1958
On Certain Convolution InequalitiesLars Inge Hedberg · Proceedings of the American Mathematical Society · 1972
An Inequality for ProbabilitiesD. A. Dawson and D. Sankoff · Proceedings of the American Mathematical Society · 1967
Almost Summable SequencesJ. P. King · Proceedings of the American Mathematical Society · 1966
A Characterization of the Weyl SpectrumAndrzej Pokrzywa · Proceedings of the American Mathematical Society · 1984
Best Approximation in Metric SpacesRoshdi Khalil · Proceedings of the American Mathematical Society · 1988
Zeros of Exponential SumsD. G. Dickson · Proceedings of the American Mathematical Society · 1965