public void When_Solve_SLE()
        {
            // Arrange
            Matrix A = new Matrix(3, 3);

            A.Elem[0][0] = 2;
            A.Elem[0][1] = 3;
            A.Elem[0][2] = -1;

            A.Elem[1][0] = 1;
            A.Elem[1][1] = -2;
            A.Elem[1][2] = 1;

            A.Elem[2][0] = 1;
            A.Elem[2][1] = 0;
            A.Elem[2][2] = 2;

            Vector F = new Vector(3);

            F.Elem[0] = 9;
            F.Elem[1] = 3;
            F.Elem[2] = 2;

            LUDecomposition lu = new LUDecomposition();


            // Act
            Vector luRes    = lu.StartSolver(A, F);
            Vector gaussRes = Gauss.StartSolver(A, F);

            // Assert
            Assert.That(A * luRes == F);
            Assert.That(A * gaussRes == F);
        }