/**
 * Legendre polynomials.
 *
 * @reference http://en.cppreference.com/w/cpp/numeric/special_math/legendre
 */
export declare function legendre(n: number, x: number): number;
/**
 * Associated Legendre polynomials.
 *
 * @reference https://en.wikipedia.org/wiki/Associated_Legendre_polynomials
 */
export declare function assoc_legendre(n: number, m: number, x: number): number;
