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diff --git a/pages/unbounded-operators/quadratic-forms.md b/pages/unbounded-operators/quadratic-forms.md
index cb1c44a..e2183ff 100644
--- a/pages/unbounded-operators/quadratic-forms.md
+++ b/pages/unbounded-operators/quadratic-forms.md
@@ -3,16 +3,6 @@ title: Quadratic Forms
 parent: Unbounded Operators
 nav_order: 5
 published: false
-description: >
-  The Hellinger–Toeplitz Theorem states that an everywhere-defined symmetric
-  operator on a Hilbert space is bounded. We give a proof using the Uniform
-  Boundedness Theorem. We give another proof using the Closed Graph Theorem.
 ---
 
 # {{ page.title }}
-
-{% definition Graph of an Operator %}
-The *graph* of an operator $T$ in a Hilbert space $\hilb{H}$
-is the set of all pairs $(x,y) \in \hilb{H}\times\hilb{H}$
-where $x$ lies in the domain of $T$ and $y=Tx$.
-{% enddefinition %}