Author:
Eastham M. S. P.,Zettl A.
Abstract
SynopsisSecond-order expressions –d2/dx2+qwhose squares are of limit-3 type are constructed. The construction is simpler than others in the literature. The functionqcan be chosen to be infinitely differentiable and decreasing and to satisfyq(x)≧ –x2(logx)2+ε(x→∞) for a given ε>0.
Publisher
Cambridge University Press (CUP)
Cited by
3 articles.
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