public void SylvesterCriterionTest_AssertMustBe_NegativeQuadraticForm()
{
// Arrange
Matrix <double> matrix = new double[, ]
{
{ 0, 2 },
{ 2, -1 }
};
var expected = DefiniteType.Negative;
// Act
var actual = Criterion.SylvestersCriterion(matrix);
// Assert
Assert.Equal(expected, actual);
}
public void SylvesterCriterionTest_AssertMustBe_PositiveQuadraticForm()
{
// Arrange
Matrix <double> matrix = new[, ]
{
{ 1, -1 },
{ -1, 1.5 }
};
var expected = DefiniteType.Positive;
// Act
var actual = Criterion.SylvestersCriterion(matrix);
// Assert
Assert.Equal(expected, actual);
}
public void SylvesterCriterionTest_AssertMustBe_AlternatingQuadraticForm()
{
// Arrange
Matrix <double> matrix = new double[, ]
{
{ 3, 2, 0 },
{ 2, -2, 1 },
{ 0, 1, -1 }
};
var expected = DefiniteType.Alternating;
// Act
var actual = Criterion.SylvestersCriterion(matrix);
// Assert
Assert.Equal(expected, actual);
}