### Question:
LUDecompositionCommonsResult implements LUDecompositionResult { @Override public double getDeterminant() { return _determinant; } LUDecompositionCommonsResult(LUDecomposition lu); @Override double getDeterminant(); @Override DoubleMatrix getL(); @Override DoubleMatrix getP(); @Override int[] getPivot(); @Override DoubleMatrix getU(); @Override DoubleArray solve(DoubleArray b); @Override double[] solve(double[] b); @Override DoubleMatrix solve(DoubleMatrix b);  }### Answer:
@Test public void testGetDeterminant() { assertThat(FuzzyEquals.SingleValueFuzzyEquals(RESULT.getDeterminant(), 1613942.00000000)).isTrue(); }