coqide software package provides proof assistant for higher-order logic (gtk interface), you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install coqide
coqide is installed in your system.
Make ensure the coqide package were installed using the commands given below,
$ sudo dpkg-query -l | grep coqide *
You will get with coqide package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Mathematics |
| Package | coqide |
| Version | 8.4pl4dfsg-3build2 |
| Description | proof assistant for higher-order logic (gtk interface) |
| Sub Section | Math |