/**
 * continued fraction expansion
 */
export declare const BetaContFrac: (a: number, b: number, x: number, epsabs: number) => number;
/**
 * inverse beta function for beta (a, b)
 */
export declare const InverseBeta: (p: number, a: number, b: number) => number;
/**
 * this is a faster approximation for real numbers
 */
export declare const LnGamma: (z: number) => number;
/** PDF of the beta distribution */
export declare const BetaPDF: (x: number, a: number, b: number) => number;
/** CDF of the beta distribution */
export declare const BetaCDF: (x: number, a: number, b: number) => number;
export declare const BetaInc: (x: number, a: number, b: number) => number;