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#author("2021-01-10T18:45:50+09:00","default:Miyashita","Miyashita")
#author("2021-03-11T16:40:48+09:00","default:Miyashita","Miyashita")
*ハンケル変換　メモ [#e2662c0e]
関数 f(r) のハンケル変換は以下の通り．
関数 \(f(r)\) のハンケル変換は以下の通り．
\[
F_\nu (k) = \int_0^{\infty} f(r) J_\nu (kr) r dr
\]
ここで \(J_\nu (kr)\) は \(\nu\) 次の（第一種）ベッセル関数．~
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ハンケル変換を使うことで，2次元波動の解を綺麗に求めたりできる．~
その過程をそのうちまとめる予定．~

#ref(https://main-t-miyashita.ssl-lolipop.jp/hydrocoast/image/Notebooks/wave2d_Integration_Gaussian.gif)
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#ref(https://main-t-miyashita.ssl-lolipop.jp/hydrocoast/image/Notebooks/wave2d_Integration_Gaussian2d.gif)

Takuya Miyashita