In this paper we use the one-dimensional Schr?dinger operator with a
negative parameter to the study of the approximation numbers of a hyperbolic
type singular operator. Estimates for the distribution function of the
approximation numbers are obtained.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.