4.3-2 Hahn-Banach Theorem (Normed spaces).
Hahn Banach Theorem in normed vector spaces
4.3-2 Hahn-Banach Theorem (Normed spaces).
Hahn Banach Theorem in normed vector spaces
4.3-4 Corollary (Norm, zero vector).
Representing vector norm using linear functional from the dual spaces.