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Diffstat (limited to 'pages/unbounded-operators/quadratic-forms.md')
| -rw-r--r-- | pages/unbounded-operators/quadratic-forms.md | 10 |
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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 %} |