Continuous linear functional on Hilbert space H given by inner-product with unique element y ∈ H. Generalises to dual-spaces of L^p / C(K) / measures. Foundational duality.
Continuous linear functional on Hilbert space H given by inner-product with unique element y ∈ H. Generalises to dual-spaces of L^p / C(K) / measures. Foundational duality.