Singular quadratic functionals of one dependent variable
Zuzana Došlá, Ondřej Došlý (1995)
Commentationes Mathematicae Universitatis Carolinae
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Singular quadratic functionals of one dependent variable with nonseparated boundary conditions are investigated. Necessary and sufficient conditions for nonnegativity of these functionals are derived using the concept of and . The paper also includes two comparison theorems for coupled points with respect to the various boundary conditions.