Published online by Cambridge University Press: 20 November 2018
Let H be a real Hilbert space with its dual space H'. The norm and inner product in H are denoted by ||.|| and 〈.,.〉 respectively. We denote by 〈.,.〉, the pairing between H' and H.
If a(u, v) is a bilinear form and F is a real-valued continuous functional on H, then we consider I[v], a functional defined by