import { result } from "../../utility/result.js";
import { DistError } from "../DistError.js";
import { BaseSymbolicDist } from "./BaseSymbolicDist.js";
export declare class Exponential extends BaseSymbolicDist<"Exponential", number> {
    readonly symbolicType = "Exponential";
    rate: number;
    private constructor();
    static make(rate: number): result<Exponential, string>;
    getArgs(): number;
    toString(): string;
    simplePdf(x: number): number;
    cdf(x: number): number;
    inv(p: number): number;
    sample(): number;
    mean(): number;
    variance(): result<number, DistError>;
    _isEqual(other: Exponential): boolean;
}
//# sourceMappingURL=Exponential.d.ts.map