@classmethod
get_poly_coeffs(cls, a, b, shift=0): 

@classmethod
get_direction_change_poly(cls, delta, shift, baseline=0): 

@classmethod
get_sqrt_remainder_coeffs(cls, delta, prev, baseline=0): 

@classmethod
s1(cls, i, j): 

@classmethod
binom(cls, i, j): 

@classmethod
get_reduced_raising_lowering_coeffs(cls, a, b):