mpbvv.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 27 行

MODULE pbvv_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 pbvv(v, x, vv, vp, pvf, pvd)

!    ===================================================
!    Purpose: Compute parabolic cylinder functions Vv(x)
!             and their derivatives
!    Input:   x --- Argument of Vv(x)
!             v --- Order of Vv(x)
!    Output:  VV(na) --- Vv(x)
!             VP(na) --- Vv'(x)
!             ( na = |n|, v = n+v0, |v0| < 1
!               n = 0,