fenics software package provides Automated Solution of Differential Equations, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fenics
fenics is installed in your system.
Make ensure the fenics package were installed using the commands given below,
$ sudo dpkg-query -l | grep fenics *
You will get with fenics package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Mathematics |
| Package | fenics |
| Version | 1:1.5.0.1 |
| Description | Automated Solution of Differential Equations |
| Sub Section | Math |