Strongly positive bilinear form

A bilinear form, a(•,•) whose arguments are elements of normed vector space V is a strongly positive bilinear form if and only if there exists a constant, c>0, such that
 * $$ a(u,u) \geq c \cdot \|u\|^2 $$

for all $$u\in V$$ where $$\|\cdot\|$$ is the norm on V.