libroot-math-matrix5.34 software package provides Matrix library for ROOT, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libroot-math-matrix5.34
libroot-math-matrix5.34 is installed in your system.
Make ensure the libroot-math-matrix5.34 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libroot-math-matrix5.34 *
You will get with libroot-math-matrix5.34 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libroot-math-matrix5.34 |
| Version | 5.34.14-1build1 |
| Description | Matrix library for ROOT |
| Sub Section | libs |