title: About the variational property of generalized discrete variable representation.
abstract: It is explained why the generalized discrete variable representation is variational neither with respect to the size (truncation) of the basis set nor with respect to the selection of grid points.
authors.affiliation: Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary. szalay.viktor@wigner.mta.hu
authors.forename: Viktor
authors.initials: V
authors.lastname: Szalay