Computation Using Partial Derivative Arrays or Multivariate Taylor Series
This set of subroutines performs computations in which each variable is
represented by its value, and its first and second partial derivatives with
respect to N independent variables, evaluated at a specified value of these
variables. Such a set of numbers can alternatively be regarded as a scaled
representation of the low order coefficients of the multivariate Taylor
series of the dependent variable expanded at the evaluation point.
This software is part of the MATH77/mathc90 collection here.