[Boost-users] looking for some help to find some functionality

Dear All,   I'm new to boost, and trying to use it in an on-going development. I'm looking for some functionality but I was not able to find them in boost.  I appreciate your help, comments, and suggestions.  Functionality I'm looking for:    1. A way determine whether a value is not a number (eg. System.Double.IsNaN(double) in C#)    2. A way to determine if a number if infinity (eg. System.Double.IsInfinity(double) in C#)    3. Availability of Normal Density Function, Cumulative Normal Density Function, and Inverse Cumulative Normal Density.  Thank you. Jeff