/** {@inheritDoc} */
 @Override
 protected void buildInitialMatrix() {
   _initialMatrix = MatrixUtil.createMatrix(5, 5);
   _initialMatrix[0][0] = new Fraction(2, 3);
   _initialMatrix[2][4] = new Fraction(6, 3);
   _initialMatrix[1][3] = new Fraction(4, 5);
   _initialMatrix[4][4] = new Fraction(2, 9);
 }
 /** {@inheritDoc} */
 @Override
 protected void buildInitialMatrix() {
   _initialMatrix = MatrixUtil.createMatrix(1, 4);
   _initialMatrix[0][0] = new Fraction(1, 2);
   _initialMatrix[0][1] = new Fraction(2);
   _initialMatrix[0][2] = new Fraction(3);
   _initialMatrix[0][3] = new Fraction(4);
 }
 /** {@inheritDoc} */
 @Override
 protected void buildExpectedMatrix() {
   _expectedMatrix = MatrixUtil.createMatrix(5, 5);
   _expectedMatrix[0][0] = new Fraction(2, 3);
   _expectedMatrix[0][1] = new Fraction(2, 3);
 }