public void DoubleDoubleErrorFunctionReflection()
{
foreach (DoubleDouble x in DoubleDoubleTest.GetRandomDoubleDoubles(1.0E-4, 1.0E4, 8))
{
DoubleDouble xErf = AdvancedDoubleDoubleMath.Erf(x);
Assert.IsTrue(-AdvancedDoubleDoubleMath.Erf(-x) == AdvancedDoubleDoubleMath.Erf(x));
}
}
public void DoubleDoubleErrorFunctionComplementiarity()
{
foreach (DoubleDouble x in DoubleDoubleTest.GetRandomDoubleDoubles(1.0E-2, 1.0E2, 8))
{
DoubleDouble xErf = AdvancedDoubleDoubleMath.Erf(x);
DoubleDouble xErfc = AdvancedDoubleDoubleMath.Erfc(x);
Assert.IsTrue(DoubleDoubleTest.IsNearlyEqual(xErf + xErfc, DoubleDouble.One));
}
}
public void DoubleDoubleErrorFunctionAgreement()
{
foreach (DoubleDouble x in DoubleDoubleTest.GetRandomDoubleDoubles(1.0E-2, 1.0E2, 8))
{
DoubleDouble xErf = AdvancedDoubleDoubleMath.Erf(x);
double xErfAsDouble = (double)xErf;
double xAsDouble = (double)x;
double xAsDoubleErf = AdvancedMath.Erf(xAsDouble);
Assert.IsTrue(TestUtilities.IsNearlyEqual(xErfAsDouble, xAsDoubleErf));
DoubleDouble xErfc = AdvancedDoubleDoubleMath.Erfc(x);
Assert.IsTrue(DoubleDoubleTest.IsNearlyEqual(xErf + xErfc, DoubleDouble.One));
}
}
public void DoubleDoubleErrorFunctionSpecialCases()
{
Assert.IsTrue(AdvancedDoubleDoubleMath.Erf(DoubleDouble.Zero) == DoubleDouble.Zero);
Assert.IsTrue(AdvancedDoubleDoubleMath.Erfc(DoubleDouble.Zero) == DoubleDouble.One);
}