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@(@\newcommand{\W}[1]{ \; #1 \; } \newcommand{\R}[1]{ {\rm #1} } \newcommand{\B}[1]{ {\bf #1} } \newcommand{\D}[2]{ \frac{\partial #1}{\partial #2} } \newcommand{\DD}[3]{ \frac{\partial^2 #1}{\partial #2 \partial #3} } \newcommand{\Dpow}[2]{ \frac{\partial^{#1}}{\partial {#2}^{#1}} } \newcommand{\dpow}[2]{ \frac{ {\rm d}^{#1}}{{\rm d}\, {#2}^{#1}} }@)@ This is cppad-20221105 documentation. Here is a link to its current documentation .
Download and Install Eigen in Build Directory

Syntax
bin/get_eigen.sh

Purpose
If you are using Unix, this command will download and install Eigen in the CppAD build directory.

Distribution Directory
This command must be executed in the distribution directory .

Source Directory
The Eigen source code is downloaded into the sub-directory external/eigen.git below the distribution directory.

Prefix
The prefix in the file bin/get_optional.sh is used for this install.

Version
This will install the following version of Eigen 

version='3.3.7'

Configuration
If the file
  external/eigen-version.configured
 exists, the configuration will be skipped. Delete this file if you want to re-run the configuration.
Input File: bin/get_eigen.sh