liblapack.so.3gf software package provides virtual package provided by libatlas3-base, liblapack3, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install liblapack.so.3gf
liblapack.so.3gf is installed in your system.
Make ensure the liblapack.so.3gf package were installed using the commands given below,
$ sudo dpkg-query -l | grep liblapack.so.3gf*
You will get with liblapack.so.3gf package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Virtual packages |
| Package | liblapack.so.3gf |
| Version | |
| Description | virtual package provided by libatlas3-base, liblapack3 |
| Sub Section | virtual |