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A note on linear ordinary quasi-differential equations

Published online by Cambridge University Press:  14 November 2011

W. N. Everitt
Affiliation:
Department of Mathematics, University of Birmingham, Birmingham B15 2TT, England

Synopsis

The theory of differential equations is largely concerned with properties of solutions of individual, or classes of, equations. This paper is given over to the converse problem - that of seeking properties of functions which require them to be, in some respect, solutions of a differential equation, and to determining all possible such differential equations.

From this point of view this paper discusses only linear ordinary quasi-differential equations of the second order. However, the methods can be extended to quasi-differential equations of general order.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1985

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References

1Coddington, E. A. and Levinson, N.. Theory of ordinary differential equations (New York: McGraw-Hill, 1955).Google Scholar
2Chaundy, T. W.. The differential calculus (Oxford University Press, 1935).Google Scholar
3Barra, G. de. Measure theory and integration (Chichester: Ellis Horwood, 1981).Google Scholar
4Everitt, W. N.. On the transformation theory of second-order linear symmetric differential expressions. Czech. Math. J. 32 (107) (1982), 275306.CrossRefGoogle Scholar
5Everitt, W. N.. Linear ordinary quasi-differential expressions. (Lecture notes for Fourth International Symposium on Differential Equations and Differential Geometry, Beijing, PR China, 1983).Google Scholar
6Everitt, W. N. and Key, Jennifer D.. On some properties of matrices associated with linear ordinary quasi-differential equations. Proc. Roy. Soc. Edinburgh Sect. A 96 (1984), 211–200.CrossRefGoogle Scholar
7Everitt, W. N. and Neuman, F.. A concept of adjointness and symmetry of differential expressions based on the generalized Lagrange identity and Green's formula. Lecture Notes in Mathematics 1032, 161169 (edited by Everitt, W. N. and Lewis, R. T.) (Heidelberg: Springer, 1983).Google Scholar
8Everitt, W. N. and Race, D.. On necessary and sufficient conditions for the existence of Carathéodory type solutions of ordinary differential equations. Quaestiones Math. 2 (1978), 507512.CrossRefGoogle Scholar
9Everitt, W. N. and Zettl, A.. Generalised symmetric ordinary symmetric differential expressions 1; the general theory. Nieuw Arch. Wisk. 27 (1979), 363397.Google Scholar
10Naimark, M. A.. Linear differential operators: II (New York: Ungar, 1968 (translated from the Russian edition of 1952, with amendments and additions).Google Scholar
11Shin, D.. Existence theorems for quasi-differential equations of order n. Dokl. Akad. Nauk SSSR 18 (1938), 515518.Google Scholar
12Zettl, A.. Formally self-adjoint quasi-differential operators. Rocky Mountain J. Math. 5 (1975), 453474.CrossRefGoogle Scholar