// Token: 0x060004F1 RID: 1265 RVA: 0x0001A4B8 File Offset: 0x000186B8
private static bool AllRealPartsNegative(int degree, double[] coeff)
{
if (coeff[degree - 1] <= 0.0)
{
return(false);
}
if (degree == 1)
{
return(true);
}
double[] array = new double[degree];
array[0] = 2.0 * coeff[0] * coeff[degree - 1];
for (int i = 1; i <= degree - 2; i++)
{
array[i] = coeff[degree - 1] * coeff[i];
if ((degree - i) % 2 == 0)
{
array[i] -= coeff[i - 1];
}
array[i] *= 2.0;
}
array[degree - 1] = 2.0 * coeff[degree - 1] * coeff[degree - 1];
int num = degree - 1;
while (num >= 0 && array[num] == 0.0)
{
num--;
}
for (int i = 0; i <= num - 1; i++)
{
coeff[i] = array[i] / array[num];
}
return(PolynomialRoots.AllRealPartsNegative(num, coeff));
}
// Token: 0x060004F0 RID: 1264 RVA: 0x0001A3E4 File Offset: 0x000185E4
public bool AllRealPartsPositive(Polynomial1 poly)
{
int degree = poly.Degree;
double[] array = new double[degree + 1];
int num = 0;
foreach (double num2 in poly.Coefficients)
{
array[num++] = num2;
}
int i;
if (array[degree] != 1.0)
{
double num3 = 1.0 / array[degree];
for (i = 0; i < degree; i++)
{
array[i] *= num3;
}
array[degree] = 1.0;
}
int num4 = -1;
i = degree - 1;
while (i >= 0)
{
array[i] *= (double)num4;
i--;
num4 = -num4;
}
return(PolynomialRoots.AllRealPartsNegative(degree, array));
}