Recent content by TZenith

1. X : Banach space Z : closed subspace of X Prove or disprove that X* ⊆ Z* where Z* and X* are dual space of Z and X, respectively. 2. X : normed space and f : X → R : linear functional. Assume that ∃a∈X and r∈(0,1] such that f(B(a,r))=R(Real numbers) where B(a,r) is open...