On the lower semi-continuity of the set valued metric projection
The author first discusses some results on the finite order intersection properties of cells and makes use of the results to study the lower semi- continuity of best approximations operators from Banach lattices on to closed ideals. He further investigates the existence of best approximation to sub-function modulus of functions modules.
finite order intersection properties of cells
scientific article; zbMATH DE number 89239