import { SpecialFunction } from './symbols';
type Functions = 'add' | 'sub' | 'mul' | 'div' | 'sup' | SpecialFunction;
export type Interval = [number, number];
export declare const width: (a: Interval) => number;
export declare const isWhole: (a: Interval) => boolean;
export declare const hasZero: (a: Interval) => boolean;
export declare const evaluate: Record<Functions, (...args: number[]) => number>;
export declare const interval: Record<Functions, (...args: Interval[]) => Interval>;
export {};