Why does positive definite guarantee uniqueness? (Peter J Olver PDE book chapter 9)
If $Su=f$ and $Sv=f$ then $S(u-v)=0$. Which is to say $u-v\in \ker S$.
Why does positive definite guarantee uniqueness? (Peter J Olver PDE book chapter 9)
If $Su=f$ and $Sv=f$ then $S(u-v)=0$. Which is to say $u-v\in \ker S$.