We give an example of an indefinite weight Sturm-Lionville problem whose eigenfunctions form a Riesz basis under Dirichlet boundary conditions but not under anti-periodic boundary conditions.
Proceedings of the Royal Society of Edinburgh
Binding, Paul and Ćurgus, Branko, "A Counterexample in Sturm-Liouville Completeness Theory" (2004). Mathematics Faculty Publications. 9.
Subjects - Topical (LCSH)
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