export function identityMatrix(n: number): number[][] {
  let matrixIdentity: number[][] = []
  for (let i: number = 0; i < n; i++) {
    let row: number[] = [];
    for (let j: number = 0; j < n; j++) {
      if (i === j) row.push(1);
      else row.push(0);
    }
    matrixIdentity.push(row);
  }
  return matrixIdentity;
}