On \(P\)- and \(p\)-convexity of Banach spaces
Summary: We show that every \(U\)-space and every Banach space \(X\) satisfying \(\delta _{X}(1)>0\) are \(P(3)\)-convex, and we study the nonuniform version of \(P\)-convexity, which we call \(p\)-convexity.
scientific article; zbMATH DE number 5791600