Added a handful of examples.

src/op/example/bounded.tex

@@ -0,0 +1,11 @@
+\section{$B(H)$}
+\label{section:hilbert-endomorphism}
+
+\begin{definition}[$B(H)$]
+\label{definition:hilbert-endomorphism}
+    Let $H$ be a Hilbert space, then $B(H) = L(H; H)$ is the algebra of all bounded linear operators on $H$. 
+\end{definition}
+
+
+% 1. Every non-trivial ideal of B(H) contains the finite-rank operators.
+% 2. If H is separable, then the only non-trivial closed idela of B(H) are the compact operators.