@article{oai:u-ryukyu.repo.nii.ac.jp:02005343,
 author = {Nishishiraho, Toshihiko and 西白保, 敏彦},
 journal = {Ryukyu mathematical journal},
 month = {Dec},
 note = {We consider some negative characters on the degree of the best approximation associated with a total, fundamental sequence of mutually orthogonal projections in Banach spaces. Furthermore, applications are discussed under the setting of abstract Fourier expansions in Banach spaces as well as homogeneous Banach spaces which include the classical function spaces as particular cases., 紀要論文},
 pages = {65--78},
 title = {Negative characters on the degree of the best approximation in Banach spaces},
 volume = {13},
 year = {2000}
}