RECENTLY, the approximation to continuous functions by the superposition of a fixed function attracts some mathematicians and engineers, because it is a basic problem in neural networks and wavelets analysis. In a ser...
Project supported by the National Natural Science Foundation of China
Let X be a real Banach space, F(?)X a wedge. Let D(?)X be a bounded open set, (?)_F(D_F) and (?)_F denote the boundary and the closure of D_F≡D∩F relative to F, respectively. CK(F) denote the families of all nonempt...