export declare function calcPhi(): number;
export declare let math: {
    phi: number;
};
export declare function gcd(a: number, b: number): number;
export declare function lcm(a: number, b: number): number;
/**
 * input: x
 * output: [a, b], where x = a/b
 * */
export declare function numberToFraction(x: number, error?: number): [number, number];
export declare function reduceFraction([a, b]: [number, number]): [number, number];