class_docstr: Chebyshev polynomial models and functions,
  including specific methods for Tn(z) n=2,4,6,8,16, Equation (27-33) of [2]
  
  NOTE: default is T8(z)
docstr: generates a 1-D polynomial instance from a list of coefficients
docstr_tok: ["generates","a","1-D","polynomial","instance","from","a","list","of","coefficients"]
code: def ForwardFactory(self, coeffs):
      """generates a 1-D polynomial instance from a list of coefficients"""
      raise NotImplementedError("use Polynomial.ForwardFactory(coeffs)")
  
imports: from .abstract_model import AbstractModel
  from numpy import sum
  from numpy import asarray
  from mystic.math import polyeval, poly1d
  from mystic.models._model_helper import chebyshev2coeffs, chebyshev4coeffs, chebyshev6coeffs, chebyshev8coeffs, chebyshev16coeffs
label_desc: Use image node_id 4 for calling the Chebyshev obj's underlying member method code with example usage: obj.ForwardFactory(coeffs) without return types