RT - Journal Article T1 - A Note on The Best Approximation in Spaces of Affine Functions JF - lu-maco YR - 2022 JO - lu-maco VO - 3 IS - 1 UR - http://maco.lu.ac.ir/article-1-106-en.html SP - 105 EP - 107 K1 - Best approximation K1 - convex set K1 - affine function K1 - sandwich theorem. AB - The proximinality of certain subspaces of spaces of bounded affine functions is proved. The results presented here are some linear versions of an old result due to Mazur. For the proofs we use some sandwich theorems of Fenchel's duality theory. LA eng UL http://maco.lu.ac.ir/article-1-106-en.html M3 10.52547/maco.3.1.11 ER -