import { DType, Tensor } from '../../../library';
import { BackwardOp, VariableI } from '../../types';
export declare class ProductBack<DTpe extends DType> implements BackwardOp<DTpe> {
    input: VariableI<DTpe>;
    product: Tensor<DTpe>;
    sumDims: number[];
    keepDims: boolean;
    constructor(input: VariableI<DTpe>, product: Tensor<DTpe>, sumDims: number[], keepDims: boolean);
    backward(grad: Tensor<DTpe>): void;
    delete(): void;
}