Automatic Differentiation of C++ algorithms, documentation

 CppAD is a package for automatic differentiation (AD) of algorithms
 written in C++. Given appropriately written C++ code that computes a
 function, CppAD augments it to also compute derivative values. The
 system uses templates, supports forward and reverse accumulation
 modes, and allows nested derivatives.
 .
 This package contains documentation.
 .
 (Or did, and would if the documentation source format hadn't changed
 to xrst which Debian cannot yet process, and will again at some point
 in the future. For now, see https://coin-or.github.io/CppAD/doc.)