Partial isometry
= Partial isometry
{wiki}
An operator $U$ on a Hilbert space is a partial isometry when it is isometric on $(\ker U)^\perp$. Equivalently, $U^*U$ is the orthogonal projection onto this initial space.
= Partial isometry
{wiki}
An operator $U$ on a Hilbert space is a partial isometry when it is isometric on $(\ker U)^\perp$. Equivalently, $U^*U$ is the orthogonal projection onto this initial space.