public void RunTest()
{
var polynomialText = "((2*x+1)*(x-4))^2*(x+3)^3";
// Os objectos responsáveis pelas operações sobre os coeficientes
var bigIntegerDomain = new BigIntegerDomain();
var bigIntegerParser = new BigIntegerParser <string>();
var bigIntToIntegerConversion = new BigIntegerToIntegerConversion();
var bigIntFractionConversion = new OuterElementFractionConversion <int, BigInteger>(
bigIntToIntegerConversion,
bigIntegerDomain);
var polynomial = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
polynomialText,
bigIntegerDomain,
bigIntegerParser,
bigIntFractionConversion,
"x");
var squareFreeFactorizationAlg = new SquareFreeFractionFactorizationAlg <BigInteger>(
bigIntegerDomain);
var result = squareFreeFactorizationAlg.Run(polynomial);
// O teste passa se a expansão da factorização ser igual ao polinómio original.
Assert.IsTrue(result.Factors.Count > 0, "At least two factors are expected.");
var factorsEnum = result.Factors.GetEnumerator();
if (factorsEnum.MoveNext())
{
var polynomialDomain = new UnivarPolynomPseudoDomain <BigInteger>(
"x",
bigIntegerDomain);
var productPol = MathFunctions.Power(
factorsEnum.Current.Value,
factorsEnum.Current.Key,
polynomialDomain);
while (factorsEnum.MoveNext())
{
var temporary = MathFunctions.Power(
factorsEnum.Current.Value,
factorsEnum.Current.Key,
polynomialDomain);
productPol = polynomialDomain.Multiply(
productPol,
temporary);
}
var fractionField = new FractionField <BigInteger>(bigIntegerDomain);
var expectedPol = new UnivariatePolynomialNormalForm <Fraction <BigInteger> >("x");
foreach (var term in productPol)
{
expectedPol = expectedPol.Add(
result.IndependentCoeff.Multiply(term.Value, bigIntegerDomain),
term.Key,
fractionField);
}
Assert.AreEqual(expectedPol, polynomial);
}
}
public void RunTest_BigIntegerPolynomial()
{
var integerDomain = new BigIntegerDomain();
var fractionField = new FractionField <BigInteger>(integerDomain);
var integerParser = new BigIntegerParser <string>();
var conversion = new BigIntegerToIntegerConversion();
var fractionConversion = new OuterElementFractionConversion <int, BigInteger>(conversion, integerDomain);
string variableName = "x";
var univarPolDomain = new UnivarPolynomEuclideanDomain <Fraction <BigInteger> >(
variableName,
fractionField);
var lagAlg = new LagrangeAlgorithm <UnivariatePolynomialNormalForm <Fraction <BigInteger> > >(univarPolDomain);
var firstValue = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
"(x-1/2)^2*(x+1/3)^5",
integerDomain,
integerParser,
fractionConversion,
variableName);
var secondValue = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
"(x-1/2)^3*(x+1/3)^2",
integerDomain,
integerParser,
fractionConversion,
variableName);
var gcd = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
"(x-1/2)^2*(x+1/3)^2",
integerDomain,
integerParser,
fractionConversion,
variableName);
var result = lagAlg.Run(firstValue, secondValue);
var mainGcdCoeff = result.GreatestCommonDivisor.GetLeadingCoefficient(fractionField);
var monicGcd = result.GreatestCommonDivisor.Multiply(
fractionField.MultiplicativeInverse(mainGcdCoeff),
fractionField);
Assert.AreEqual(gcd, monicGcd);
var firstTermExpression = univarPolDomain.Multiply(result.FirstFactor, result.FirstItem);
var secondTermExpression = univarPolDomain.Multiply(result.SecondFactor, result.SecondItem);
var actualExpression = univarPolDomain.Add(firstTermExpression, secondTermExpression);
Assert.AreEqual(result.GreatestCommonDivisor, actualExpression);
actualExpression = univarPolDomain.Multiply(result.GreatestCommonDivisor, result.FirstCofactor);
Assert.AreEqual(result.FirstItem, actualExpression);
actualExpression = univarPolDomain.Multiply(result.GreatestCommonDivisor, result.SecondCofactor);
Assert.AreEqual(result.SecondItem, actualExpression);
}
public void GetPolynomialDerivativeTest_IntegerFraction()
{
var polynomialText = "1/2*x^5+3/4*x^4-2/7*x^3+5/3*x^2+1/5*x+9";
var polynomialDerivativeText = "5/2*x^4+3*x^3-6/7*x^2+10/3*x+1/5";
var variableName = "x";
var integerDomain = new IntegerDomain();
var longDomain = new LongDomain();
var bigIntegerDomain = new BigIntegerDomain();
var integerParser = new IntegerParser <string>();
var longParser = new LongParser <string>();
var bigIntegerParser = new BigIntegerParser <string>();
var longConversion = new LongToIntegerConversion();
var bigIntegerConversion = new BigIntegerToIntegerConversion();
var integerFractionConversion = new ElementFractionConversion <int>(integerDomain);
var longfractionConversion = new OuterElementFractionConversion <int, long>(longConversion, longDomain);
var bigIntegerfractionConversion = new OuterElementFractionConversion <int, BigInteger>(bigIntegerConversion, bigIntegerDomain);
var integerFractionField = new FractionField <int>(integerDomain);
var longFractionField = new FractionField <long>(longDomain);
var bigIntegerFractionField = new FractionField <BigInteger>(bigIntegerDomain);
// Coeficientes inteiros
var integerPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol <int, IntegerDomain>(
polynomialText,
integerDomain,
integerParser,
integerFractionConversion,
variableName);
var integerPolynomialDerivative = TestsHelper.ReadFractionalCoeffsUnivarPol <int, IntegerDomain>(
polynomialDerivativeText,
integerDomain,
integerParser,
integerFractionConversion,
variableName);
var integerActualPolDerivative = integerPolynomial.GetPolynomialDerivative(integerFractionField);
Assert.AreEqual(integerPolynomialDerivative, integerActualPolDerivative);
// Coeficientes longos
var longPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol <long, LongDomain>(
polynomialText,
longDomain,
longParser,
longfractionConversion,
variableName);
var longPolynomialDerivative = TestsHelper.ReadFractionalCoeffsUnivarPol <long, LongDomain>(
polynomialDerivativeText,
longDomain,
longParser,
longfractionConversion,
variableName);
var longActualPolDerivative = longPolynomial.GetPolynomialDerivative(longFractionField);
Assert.AreEqual(longPolynomialDerivative, longActualPolDerivative);
var bigIntegerPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
polynomialText,
bigIntegerDomain,
bigIntegerParser,
bigIntegerfractionConversion,
variableName);
var bigIntegerPolynomialDerivative = TestsHelper.ReadFractionalCoeffsUnivarPol <BigInteger, BigIntegerDomain>(
polynomialDerivativeText,
bigIntegerDomain,
bigIntegerParser,
bigIntegerfractionConversion,
variableName);
var bigIntegerActualPolDerivative = bigIntegerPolynomial.GetPolynomialDerivative(bigIntegerFractionField);
Assert.AreEqual(bigIntegerPolynomialDerivative, bigIntegerActualPolDerivative);
}
public void PowerTest_FractionPolynomial()
{
var integerDomain = new IntegerDomain();
var longDomain = new LongDomain();
var bigIntegerDomain = new BigIntegerDomain();
var variableName = "x";
var integerPolynomialField = new UnivarPolynomEuclideanDomain <Fraction <int> >(
variableName,
new FractionField <int>(integerDomain));
var longPolynomialField = new UnivarPolynomEuclideanDomain <Fraction <long> >(
variableName,
new FractionField <long>(longDomain));
var bigIntegerPolynomialField = new UnivarPolynomEuclideanDomain <Fraction <BigInteger> >(
variableName,
new FractionField <BigInteger>(bigIntegerDomain));
// Leitores
var integerParser = new IntegerParser <string>();
var longParser = new LongParser <string>();
var bigIntegerParser = new BigIntegerParser <string>();
var integerConversion = new OuterElementFractionConversion <int, int>(new ElementToElementConversion <int>(), integerDomain);
var longToIntegerConversion = new OuterElementFractionConversion <int, long>(new LongToIntegerConversion(), longDomain);
var bigIntegerToIntegerConversion = new OuterElementFractionConversion <int, BigInteger>(new BigIntegerToIntegerConversion(), bigIntegerDomain);
var intPowers = new int[3] {
2, 3, 4
};
var longPowers = new long[3] {
2, 3, 4
};
var bigIntPowers = new BigInteger[3] {
2, 3, 4
};
var polynomialsTexts = new string[3] {
"1/3*x^3-2/3*x^2+3/2*x-1/2", "2*x^2+4/3*x+4/9", "7/5*x+1"
};
var expectedPolinomialsTexts = new string[3] {
"1/9*x^6-4/9*x^5+13/9*x^4-7/3*x^3+35/12*x^2-3/2*x+1/4",
"8*x^6+16*x^5+16*x^4+256/27*x^3+32/9*x^2+64/81*x+64/729",
"2401/625*x^4+1372/125*x^3+294/25*x^2+28/5*x+1"
};
// Coeficientes inteiros.
for (int i = 0; i < 3; ++i)
{
var polynomialValue = TestsHelper.ReadFractionalCoeffsUnivarPol(
polynomialsTexts[i],
integerDomain,
integerParser,
integerConversion,
variableName);
var expectedPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol(
expectedPolinomialsTexts[i],
integerDomain,
integerParser,
integerConversion,
variableName);
var actualPolynomial = MathFunctions.Power(polynomialValue, intPowers[i], integerPolynomialField);
Assert.AreEqual(expectedPolynomial, actualPolynomial);
}
// Coeficientes longos.
for (int i = 0; i < 3; ++i)
{
var polynomialValue = TestsHelper.ReadFractionalCoeffsUnivarPol(
polynomialsTexts[i],
longDomain,
longParser,
longToIntegerConversion,
variableName);
var expectedPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol(
expectedPolinomialsTexts[i],
longDomain,
longParser,
longToIntegerConversion,
variableName);
var actualPolynomial = MathFunctions.Power(polynomialValue, intPowers[i], longPolynomialField);
Assert.AreEqual(expectedPolynomial, actualPolynomial);
}
// Coeficientes correspondentes a inteiros de precisão arbitrária.
for (int i = 0; i < 3; ++i)
{
var polynomialValue = TestsHelper.ReadFractionalCoeffsUnivarPol(
polynomialsTexts[i],
bigIntegerDomain,
bigIntegerParser,
bigIntegerToIntegerConversion,
variableName);
var expectedPolynomial = TestsHelper.ReadFractionalCoeffsUnivarPol(
expectedPolinomialsTexts[i],
bigIntegerDomain,
bigIntegerParser,
bigIntegerToIntegerConversion,
variableName);
var actualPolynomial = MathFunctions.Power(polynomialValue, intPowers[i], bigIntegerPolynomialField);
Assert.AreEqual(expectedPolynomial, actualPolynomial);
}
}
