[boost] about bessel function

Subject: [boost] about bessel function
From: llwaeva_at_[hidden]
Date: 2013-08-16 18:59:48

Hi all,
  I am testing the bessel function boost::math::cyl_bessel_j in gnu
compiler with boost 1.51.0, I am testing 

boost::math::cyl_bessel_j(2000, 0.9)
boost::math::cyl_bessel_j(4000, 0.9)

the first one give zero but the second one gives infinity while it
should give zero also. I wonder why it doesn't work when the order is
bigger than 4000?