@article{oai:u-ryukyu.repo.nii.ac.jp:02005347,
 author = {Nishishiraho, Toshihiko and 西白保, 敏彦},
 journal = {Ryukyu mathematical journal},
 month = {Dec},
 note = {Korovkin type approximation closures are discussed in the spaces of vector-valued functions on compact Hausdorff spaces. For this, it is introduced that the notions of an M_T-envelope, an M_T-affine function as well as an M_T-representing operator and a T-Choquet boundary for a linear subspace M and a positive linear operator T under certain appropriate requirements., 紀要論文},
 pages = {53--69},
 title = {Korovkin type approximation closures for vector-valued functions},
 volume = {9},
 year = {1996}
}