mjy01a.f90

数值计算和数值分析在Fortran下的特殊函数库,是数值计算的必备

MODULE jy01a_func
 
! From the book "Computation of Special Functions"
!      by Shanjie Zhang and Jianming Jin
!   Copyright 1996 by John Wiley & Sons, Inc.
! The authors state:
!   "However, we give permission to the reader who purchases this book
!    to incorporate any of these programs into his or her programs
!    provided that the copyright is acknowledged."
 
IMPLICIT NONE
INTEGER, PARAMETER  :: dp = SELECTED_REAL_KIND(12, 60)
 
CONTAINS
 

SUBROUTINE jy01a(x, bj0, dj0, bj1, dj1, by0, dy0, by1, dy1)

!    =======================================================
!    Purpose: Compute Bessel functions J0(x), J1(x), Y0(x),
!             Y1(x), and their derivatives
!    Input :  x   --- Argument of Jn(x) & Yn(x) ( x