# Today I Learned

Some of the things I've learned every day since Oct 10, 2016

In linear algebra, if $T$ is a linear operator $T: V \rightarrow V$ over a finite vector space $V$, then there exists a unique $T^*: V \rightarrow V$, the adjoint operator, such that
$\langle T x, y \rangle = \langle x, T^* y \rangle$
for all $x, y \in V$.