import { BigDecimal, BigDecimalOptions, ComplexNumber } from '../computation/index';
export declare function isNumberType(x: any): x is number;
export declare function complexNumber(a: number | string | ComplexNumber, b?: number): ComplexNumber;
declare global {
    interface Number {
        toBigDecimal(options?: BigDecimalOptions): BigDecimal;
        toComplexNumber(b?: number): ComplexNumber;
    }
}
export declare function toBigDecimal(options?: BigDecimalOptions): BigDecimal;
export declare function toComplexNumber(b?: number): ComplexNumber;