定义 满足递推关系 [=“Cn(2)]=2“C-1(2) d zC(2) 的函数{C(z)}统称为柱函数 J(2)是柱函数,称为第一类柱函数 N(2)是柱函数,称为第二类柱函数Cylindrical Functions Applications of Bessel ftns Definition of Cylindrical Functions Hankel Functions ½Â ÷v4í'X d dz [z νCν(z)] = z νCν−1(z) d dz z −νCν(z) = −z −νCν+1(z) ¼ê{Cν(z)}ڡμê Jν(z)´Î¼ê§¡1aμê Nν(z)´Î¼ê§¡1aÎ¼ê ±y²µÎ¼ê½´Bessel§) Jν(z)ÚNν(z)5|ܧ´Ä´Î¼êº C. S. Wu 1ù μê()