mcikva.f90

来自「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」· F90 代码 · 共 25 行

MODULE cikva_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 cikva(v, z, vm, cbi, cdi, cbk, cdk)

!       ============================================================
!       Purpose: Compute the modified Bessel functions Iv(z), Kv(z)
!                and their derivatives for an arbitrary order and
!                complex argument
!       Input :  z --- Complex argument
!                v --- Real order of Iv(z) and Kv(z)
!                      ( v = n+v0, n = 0,1,2,