Characterization and uniqueness of nonlinear uniform approximation

Wenshan Yang, Chong Li, G. A. Watson
1997 Proceedings of the Edinburgh Mathematical Society  
Characterization and uniqueness results are given for uniform approximation which extend to suns previously known results for convex sets.
doi:10.1017/s0013091500023956 fatcat:lfdg5ibkjrgcxd5ji5ur6nf44u