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

${\displaystyle a(u,u)\geq c\cdot \|u\|^{2}}$

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

References

• AMS 108 p.120