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- Function: double gsl_sf_bessel_Jnu (double nu, double x)
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- Function: int gsl_sf_bessel_Jnu_e (double nu, double x, gsl_sf_result * result)
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These routines compute the regular cylindrical Bessel function of
fractional order @math{nu}, @math{J_\nu(x)}.
- Function: int gsl_sf_bessel_sequence_Jnu_e (double nu, gsl_mode_t mode, size_t size, double v[])
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This function computes the regular cylindrical Bessel function of
fractional order @math{\nu}, @math{J_\nu(x)}, evaluated at a series of
@math{x} values. The array v of length size contains the
@math{x} values. They are assumed to be strictly ordered and positive.
The array is over-written with the values of @math{J_\nu(x_i)}.
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