Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-26T01:29:01.918Z Has data issue: false hasContentIssue false

Adjoints and self-adjointness for a differential operator with a varying structure

Published online by Cambridge University Press:  14 November 2011

P. C. Das
Affiliation:
Department of Mathematics, Indian Institute of Technology, Kanpur, India 208016
Uma Shanker Prasad
Affiliation:
Department of Mathematics, Indian Institute of Technology, Kanpur, India 208016

Synopsis

In this paper the adjoint operator is derived for a multi-point differential operator with a varying structure in a suitably chosen Hilbert space. The formal differential operator is given by different differential expressions in the adjoining intervals. This form of adjoint operator is used to characterize self-adjointness.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1982

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Bryan, R. N.. Adjoint interior-point boundary value conditions for linear differential operators. Canad. Math. Bull. 20 (1977), 447450.CrossRefGoogle Scholar
2Dunford, N.. and Schwartz, J. T.. Linear Operators Part II (New York: Wiley 1963).Google Scholar
3Krall, A. M.. Boundary value problems with interior-point boundary conditions. Pacific J. Math. 29 (1969), 561570.CrossRefGoogle Scholar
4Locker, J.. Self-adjointness for multi-point differential operators. Pacific J. Math. 45 (1963), 561570.CrossRefGoogle Scholar
5Loud, W. S.. Self-adjoint multi-point boundary value problems. Pacific J. Math. 24 (1968), 303317.CrossRefGoogle Scholar
6Neuberger, J. W.. The lack of self-adjointness in the three point boundary value problems. Pacific J. Math. 18 (1966), 165168.CrossRefGoogle Scholar
7Wilder, C. E.. Problems in the theory of linear differential equations with auxiliary conditions at more than two points. Trans. Amer. Math. Soc. 19 (1918), 157166.CrossRefGoogle Scholar
8Zettl, A.. The lack of self-adjointness in three point boundary value problems. Proc. Amer. Math. Soc. 17 (1966), 368371.CrossRefGoogle Scholar
9Zettl, A.. Adjoint and self-adjoint boundary value problems with interface conditions. SIAM J. Appl. Math. 16 (1968), 851859.CrossRefGoogle Scholar