Module J1Y1 in SPECFUN

• SPECFUN Information

• Components
  • Fullsource from NETLIB
  • Source from NETLIB
  • Test(J1) from NETLIB
  • Test(Y1) from NETLIB

J1Y1

 
Computes first-order Bessel functions of the first and second kind (J1 and Y1),
for real arguments X, where 0 < X <= XMAX for Y1, and |X| <= XMAX for J1. Uses rational
functions that are theoretically accurate to at least 18 significant decimal
digits for X <= 8, and at least 18 decimal places for X > 8.
 
Classes  :  C10a1 . Bessel functions J, Y, and H of real argument and integer
                  order
 
Type     : Fortran subroutine in SPECFUN package.
Access   : Public domain. Portable.
Precision: Single or double.
Note     : Both single and double precision versions can be extracted from the
           supplied source with simple editing changes.
 
Usage    : S = BESJ1(X); S = BESY1(X)
 
Details  : Fullsource Source Test(J1) Test(Y1)
Sites    : (1) NETLIB
 

Implementation of J1Y1 from SPECFUN on NETLIB

 
NETLIB:    Public access repository, The University of Tennessee at
           Knoxville and Bell Laboratories
 
Precision: Single or double.
Note     : Both single and double precision versions can be extracted from the
           supplied source with simple editing changes.
 
You may access components from NETLIB outside GAMS as follows.
 
   Source       : echo "send only j1y1 from specfun" | mail netlib@ornl.gov
   Fullsource   : echo "send j1y1 from specfun" | mail netlib@ornl.gov
   Test(Y1)     : echo "send y1test from specfun" | mail netlib@ornl.gov
   Test(J1)     : echo "send j1test from specfun" | mail netlib@ornl.gov