code: def _coeff_smooth(lam):
      xi = 1 - 96 * lam + 24 * lam * sqrt(3 + 144 * lam)
      omeg = arctan2(sqrt(144 * lam - 1), sqrt(xi))
      rho = (24 * lam - 1 - sqrt(xi)) / (24 * lam)
      rho = rho * sqrt((48 * lam + 24 * lam * sqrt(3 + 144 * lam)) / xi)
      return rho, omeg
  
imports: from numpy import logical_and, asarray, pi, zeros_like, piecewise, array, arctan2, tan, zeros, arange, floor
  from numpy.core.umath import sqrt, exp, greater, less, cos, add, sin, less_equal, greater_equal
  from .spline import cspline2d, sepfir2d
  from scipy.special import comb
  from scipy._lib._util import float_factorial
label_desc: Use image node_id 7 for calling a global function with example usage: _coeff_smooth(lam) and returns: rho,  omeg