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Subsections

7-1

$\displaystyle \Int dx \, f(x) \delta(x-1)$ (17)

7-1解答

$\displaystyle \Int dx \, f(x) \delta(x-1)$ $\displaystyle =\Int dX \, f(X+1) \delta(X)\, ; \qquad x-1 =X,\, dx=dX,\,\quad \... ... & -\infty & \to & +\infty \\ \hline X & -\infty & \to & +\infty \\ \end{array}$    
  $\displaystyle =f(1)$    


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著者: 茅根裕司 chinone_at_astr.tohoku.ac.jp