From "Modern Quantum Mechanics, revised edition" by J.J. Sakurai, page 56.(adsbygoogle = window.adsbygoogle || []).push({});

In equation (1.7.31) it is given,

[tex]\begin{eqnarray}

\delta(x' - x'') & = & | N |^2 \int dp' \exp \left[ \frac{ip'(x'-x'')}{\hbar} \right] \\

& = & 2 \pi \hbar | N |^2 \delta(x' - x'' )

\end{eqnarray}[/tex]

How does the right side happen. Is this a definition of the delta function?

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# Sakurai: Page 56

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