import { Matrix } from "../types/misc";
export declare function getUnitMatrix(n: number): Matrix<number>;
/**
 * Invert a matrix and compute its determinant using Gaussian Elimination.
 *
 * The Matrix should be a square matrix, and should be indexed [col][row] instead of the
 * standard mathematical indexing [row][col].
 */
export declare function invertMatrix(M: Matrix<number>): {
    inverted?: Matrix<number>;
    determinant: number;
};
/**
 * Matrix multiplication of 2 matrices.
 * ex: matrix1 : n x l, matrix2 : m x n => result : m x l
 *
 * Note: we use indexing [col][row] instead of the standard mathematical notation [row][col]
 */
export declare function multiplyMatrices(matrix1: Matrix<number>, matrix2: Matrix<number>): Matrix<number>;
/**
 * Return the input if it's a scalar or the first element of the input if it's a matrix.
 */
export declare function toScalar<T>(arg: Matrix<T> | T): T;
export declare function isMultipleElementMatrix(arg: any): boolean;