NumericalMath`CauchyPrincipalValue`
New method option "PrincipalValue" has been added to the NIntegrate function of the built-in Mathematica kernel.
The add-on package is now available on the web at library.wolfram.com/infocenter/MathSource/6778.
To evaluate the Cauchy principal value of 
, use the "PrincipalValue" Method option for NIntegrate:
Version 5.2
![<< NumericalMath`CauchyPrincipalValue`;
CauchyPrincipalValue[1/(x - x^2), {x, -1, {0}, 2}]](Files/CauchyPrincipalValue.en/legacy_1.gif)