3 papers
math.SP2016
Selfadjoint and sectorial extensions of Sturm-Liouville operators
B. M. Brown, W. D. Evans
The self-adjoint and -sectorial extensions of coercive Sturm-Liouville operators are characterised, under minimal smoothness conditions on the coefficients of the differential e…
math.SP1998
Approximate diagonalization in differential systems and an effective algorithm for the computation of the spectral matrix
B. M. Brown, M. S. P. Eastham, D. K. R. McCormack +1
This paper reports on recent work to compute the asymptotic solution of a n-th order ordinary differential equation. Symbolic methods are used to compute the asymptotics over a lar…
math.SP1997
On the spectrum of second order differential operators with complex coefficients
B. M. Brown, W. D. Evans, D. K. R. McCormack +1
The Weyl-Sims classification for a second-order ordinary differential equation with general complex coefficients is investigated. Connections are then established between the assoc…