Please read the licence and indicate at the bottom whether you accept or decline its terms.


Motivation and Preamble

The ATOM package has been devised for its general use in research
within the academic community. Some conditions have been defined for
the use, distribution, and modification of the package.


"The ATOM package" is the suite of software, including the ATOM
code itself, but also all other software, documentation, scripts, and
ancillary support material distributed as a single entity. This
Licence covers the entirety of said data.

"The Authors" are:

 -- Sverre Froyen
 -- Norman J. Troullier
 -- Jose Luis Martins
 -- Luis C. Balbás
 -- José M. Soler
 -- Alberto Garcia

"The Developers" are (currently) Alberto Garcia.

"The Copyright-Holder" is the set of Authors.

The valid distributors of the ATOM package ("The Distributors") are
the Developers as specified above.

The Licensee is the person (never an institution) to whom the ATOM
package is distributed (under the terms of this Licence) by the
Distributors; they are bound by this agreement.


There is no warranty for any part of the ATOM package. The ATOM
package is provided "as-is" without warranty of any kind, either
express or implied, including but not limited to the implied
warranties of merchantability or fitness for a particular purpose. In
no event shall the Distributors be liable for any direct, indirect,
incidental, special, exemplary, or consequential damages (including,
but not limited to, procurement of substitute goods or services; loss
of use, data, or profits; or business interruption) however caused and
on any theory of liability, whether in contract, strict liability, or
tort (including negligence or otherwise) arising in any way out of the
use of this software, even if advised of the possibility of such
damage. The entire risk as to the quality or performance of the
program, or any action the Licensee may take based on the output of
any part of the ATOM package, is with the Licensee.

3. Limitation of Usage

The use of the ATOM package under the present Licence is restricted to
academic purposes, i.e., leading to open publication of results, with
neither withhold of information nor intentional delay in publication.

The above-mentioned right to use the code is extensive to the members
of the research group of the Licensee as long as the use is in
collaboration with the Licensee leading to co-authored publication(s).

4. Support

The present Licence does not imply support services of any kind to the
Licensee by the Distributors, including, but not limited to,
installation, compilation and use of the software in the package.

5. Modification

Licensees are permitted to modify ATOM for their own private use; in
any paper containing results wholly or partially derived from the use
of a modified version, the authors are required to state that a
privately modified version is used, and satisfy the conditions of use
stated above.

The Developers encourage Licensees to submit their modifications of
the ATOM package to them, so that the ATOM package does not fork,
and furthermore so that the package can be improved for all
users. Licensees can thereby benefit from the ulterior developments of

To this end, the Developers wish to encourage Licensees to make any
modifications to the ATOM package in as modular a fashion as
possible: for example, interacting via files, or via well-defined
interface calls. This permits maintenance of these modifications as a
separate entity in many cases, and may allow their separation from
ATOM and distribution as a separate piece of software: in that case,
such software is not subject to this Licence, and the authors of the
separate software are free to choose any licensing terms they desire.

However, if a given modification must be incorporated directly into
the ATOM package, the author(s) of any such modifications must
provide a perpetual, royalty-free, irrevocable license to the 
Copyright-Holder, to further modify their modifications 
("the Contributed Code") as may prove necessary for the
future development of ATOM, and to distribute the Contributed Code
(in its original or any later modified form) as part of the ATOM

The Developers, in the interests of maintaining the efficiency of the
ATOM package and the modularity of its code base, actively encourage
all those considering modifications to the ATOM package to discuss
their planned modifications with the Developers beforehand.

6. Redistribution

The Authors reserve the exclusive right to distribute the ATOM
package. Licensees have no right to distribute the ATOM package, a
modified or alternative version thereof, or any other program making
direct use of parts of the ATOM package, without the prior written
consent of the Distributors.

7. All Other Rights

All other rights not explicitly mentioned in this document are
reserved. In particular, the Authors reserve all rights to resolve any
and all conflicts arising in the development and distribution policies
of the ATOM package.

Without accepting the Licence, a prospective Licensee does not have the
right to use or modify the ATOM package.

Everyone is permitted to copy and distribute verbatim copies of this
Licence document, but changing it is not permitted.

I declare that I intend to use ATOM for academic purposes, and I ACCEPT its licence terms.

I CANNOT ACCEPT the terms of the ATOM licence