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<p>for such a particle contains ; the Hilbert space of <a href="page.php?w=complex_number">complex-valued</a>, <a href="page.php?w=square-integrable_function">square-integrable function</a>s on the <a href="page.php?w=real_line">real line</a>.</p>

<p>The position operator is defined as the <a href="page.php?w=self-adjoint_operator">self-adjoint operator</a></p>

<p>with <a href="page.php?w=domain_of_definition">domain of definition</a></p>

<p>and coordinate function  sending each point  to itself, such that</p>

<p>for each pointwisely defined</p><p>
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