1)n-th class of Baire functions,第 n 类贝尔函数2)Bessel function;Bessel function of the first kind,第一类贝塞尔函数;贝塞尔函数3)modified Bessel function of the second kind,变形第二类贝塞尔函数4)modified Bessel function of the third kind,变形第三类贝塞尔函数5)modified Bessel function of the first kind,变形第一类贝塞尔函数6)Hankel function;Bessel function of the third kind,第三类贝塞尔函数;汉克尔函数