Copyright
© 2017 by Rafael Capurro, all rights reserved. This text may be
used
and shared in accordance with the fair-use provisions of U.S. and
international
copyright law, and it may be archived and redistributed in electronic
form,
provided that the author is notified and no fee is charged for access.
Archiving, redistribution, or republication of this text on other
terms,
in any medium, requires the consent of the author.