ChebyshevExpansion# class nfflr.nn.ChebyshevExpansion(basis_size: int)[source]# Expand features in (-1, 1) interval with Chebyshev basis. Methods forward(x) Trigonometric definition of Chebyshev polynomial basis for |x| lq 1. forward(x)[source]# Trigonometric definition of Chebyshev polynomial basis for |x| lq 1. Tn(cos(theta)) = cos(n theta)