Requirements

Libraries
- Compulsory
  In order to compile EXC (in any Unix-like machine), you need to provide it with some external linear algebra libraries, like LAPACK+BLAS, or ATLAS, MKL, etc. (http://www.netlib.org)
- Recommended
  
  EXC also needs to perform Fourier transformations. This is accomplished by the provided Goedecker-FFT. However, the use of the (free) FFTW3 package is highly recommended. (http://www.fftw.org)
Propaedeutics
- Ground state file
  Abinit kss output file; interface with the CP (developed by Lucia and Giovanni) qplda output file is provided as well.
- Screening and gw corrections (if necessary)
  Abinit scr,gw output file or GW (developed by Rex Godby, Lucia, Giovanni and Valerio) em1,gw file.

Version 3.2 available Body: The new version of EXC is available. In particular the finite momentum transfer has been implemented.	New Release: v3.1 Body: A new version of the code has been released: v3.1. Few changes and some bug corrections for this intermediate release.
New Release v3.0 Body: A new version of the code has been released: v3.0.	Theoretical Spectroscopy Lectures Body: Electronic excitations are probed by experimental techniques such as optical absorption, EELS and photo-emission (direct or inverse).
Cecam School on Theoretical Spectroscopy Body: Theoretical Spectroscopy Lectures: Theory and Codes

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