grandes-ecoles 2018 Q1

grandes-ecoles · France · centrale-maths2__official Proof Proof of Set Membership, Containment, or Structural Property
Show that $\mathcal{H}(U)$ is a vector subspace of $\mathcal{C}^2(U, \mathbb{R})$.
Show that $\mathcal{H}(U)$ is a vector subspace of $\mathcal{C}^2(U, \mathbb{R})$.