Limit-Point Criteria For Not Necessarily Symmetric Ordinary Differential Expressions
Copyright policy )Limit-Point Criteria For Not Necessarily Symmetric Ordinary Differential Expressions
Sufficient conditions on the coefficients for \(M\) to be in the limit- point case are found. Here \(M\) is a not necessarily symmetric (formally selfadjoint) ordinary differential expression. These conditions are found by applying known results to powers of the symmetric case \(M^ +M\), where \(M^ +\) is the adjoint expression. Examples are given to show that new criteria can be obtained in this way. In fact, some criteria can be improved by taking higher and higher powers.
- University of Lille France
- Essen University Hospital Germany
not necessarily symmetric ordinary differential expressions, General theory of ordinary differential operators, limit-point criteria, General spectral theory of ordinary differential operators, Weyl theory and its generalizations for ordinary differential equations
not necessarily symmetric ordinary differential expressions, General theory of ordinary differential operators, limit-point criteria, General spectral theory of ordinary differential operators, Weyl theory and its generalizations for ordinary differential equations
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