/**
 * Check if the parameter is of type number
 * @param a Any input
 */
export declare const isNumber: <T>(a: T) => boolean;
/**
 * Check if the parameter is a fractional value
 * @param a The number a
 */
export declare const isFraction: (a: number) => boolean;
/**
 * Gets the dimensions of the matrix a
 * @param a A matrix (2D array)
 */
export declare const getDimensions: <T>(a: T[][]) => {
    rows: number;
    cols: number;
};
/**
 * Check if the matrix contains string values.
 * @param matrix The matrix
 */
export declare const containsStringValues: <T>(matrix: T[][]) => boolean;
/**
 * Checks if the matrix is a square one
 * @param matrix The matrix
 */
export declare const isSquareMatrix: <T>(matrix: T[][]) => boolean;
/**
 * Loops through the matrix to find the row with the most elements an returns how many elements there are
 * @param matrix The given matrix
 * @returns The amount of elements
 */
export declare const getHighestRowLength: <T>(matrix: T[][]) => number;
export declare const fillEmptyRows: <T>(matrix: T[][], rowLength: number, value: T) => (T | null)[][];
/**
 * Generates an identity matrix of size n
 * @param n The size of the identity matrix
 */
export declare const generateIdentityMatrix: (n: number) => number[][] | undefined;
/**
 * Generates a 0 matrix the size of n
 * @param n The size of the 0 matrix
 */
export declare const generateZeroMatrix: (n: number) => number[][] | undefined;
/**
 * Swaps 2 rows.
 * @param matrix The matrix
 * @param r1 First row
 * @param r2 Second row
 */
export declare const swapRow: <T>(matrix: T[][], r1: number, r2: number) => T[][] | undefined;
/**
 * Swaps two columns
 * @param matrix The matrix
 * @param c1 First column
 * @param c2 Second column
 */
export declare const swapCol: <T>(matrix: T[][], c1: number, c2: number) => T[][] | undefined;
/**
 * Swaps 2 elements in an array
 * @param matrix The matrix
 * @param r1 The first element's row index
 * @param c1 The first element's column index
 * @param r2 The second element's row index
 * @param c2 The second element's column index
 */
export declare const swapElement: <T>(matrix: T[][], r1: number, c1: number, r2: number, c2: number) => T[][] | undefined;
/**
 * Multiplies the whole matrix with lambda λX
 * @param matrix The matrix
 * @param λ The number with which you want to multiply the matrix
 * @param precision [precision = 3] The specificity to which you want to round the numbers
 */
export declare const multiplyMatrix: (matrix: number[][], λ: number, precision?: number) => number[][] | undefined;
/**
 * Multiplies a single row of the matrix with λ
 * @param matrix The matrix
 * @param row The row which you want to multiply
 * @param λ The number with which you want to multiply the row
 */
export declare const multiplyRow: (matrix: number[][], row: number, λ: number) => number[][] | undefined;
/**
 * Multiplies a single column of the matrix with λ
 * @param matrix The matrix
 * @param col The column which you want to multiply
 * @param λ The number with which you want to multiply the column
 */
export declare const multiplyCol: (matrix: number[][], col: number, λ: number) => number[][] | undefined;
/**
 * Counts the amount of non 0 rows and subtracts it from the amount of rows in the matrix
 * @param matrix The matrix
 */
export declare const rank: (matrix: number[][]) => number;
/**
 * Calculates the minor of a given matrix
 * @param matrix The matrix
 * @param row The row
 * @param column The column
 */
export declare const getMatrixMinor: (matrix: number[][], row: number, column: number) => number[][] | undefined;