A ball between c₀₀ and ℓ∞ that is the nonexpansive bijective image of a ball between c₀₀ and c₀ lies in c₀

Initializing...

A ball between c₀₀ and ℓ∞ that is the nonexpansive bijective image of a ball between c₀₀ and c₀ lies in c₀ · Prove2Me