“Bessel equation”的概念、定义、翻译、参考文献-科学参考

单词	Bessel equation
释义	Bessel equation [`bes·ǝl i`kwā·zhǝn] ^MATHEMATICS The differential equation z²ƒ ''(z ) + zƒ '(z ) + (z²-n²)ƒ (z ) = 0.
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