# Plugin v2rdm_casscf by A. E. DePrince

Code author: A. E. DePrince

Section author: Lori A. Burns

A variational 2-RDM-driven CASSCF plugin to PSI4

## Installation

Binary

- v2rdm_casscf is available as a conda package for Linux and macOS (and Windows, through the Ubuntu shell).

- If using the Psi4conda installer, v2rdm_casscf has already been installed alongside.

- If using the PSI4 conda package, the v2rdm_casscf conda package can be obtained through `conda install v2rdm_casscf -c psi4` or `conda install psi4-rt -c psi4`.

- If using PSI4 built from source, and anaconda or miniconda has already been installed (instructions at Quick Installation), v2rdm_casscf can be obtained through `conda install v2rdm_casscf -c psi4`. Then, hint its location with `PYTHONPATH`.

- To remove a conda installation, `conda remove v2rdm_casscf`.

Source

- If using PSI4 built from source and you want v2rdm_casscf built from from source also, build it, then hint its location with `PYTHONPATH`.