Extension operators on balls and on spaces of finite sets
Antonio Avilés, Witold Marciszewski (2015)
Studia Mathematica
Similarity:
We study extension operators between spaces of continuous functions on the spaces of subsets of X of cardinality at most n. As an application, we show that if is the unit ball of a nonseparable Hilbert space H equipped with the weak topology, then, for any 0 < λ < μ, there is no extension operator .