compute_multivariate_orthonormal_basis_product

pyapprox.multivariate_polynomials.compute_multivariate_orthonormal_basis_product(product_coefs_1d, poly_index_ii, poly_index_jj, max_degrees1, max_degrees2, tol=4.440892098500626e-16)

Compute the product of two multivariate orthonormal bases and re-express as an expansion using the orthnormal basis.