The source code for the Armadillo library can be distributed and/or modified under the
terms of the GNU Lesser General Public License (LGPL)
as published by the Free Software Foundation, either version 3 of the License or (at your option)
any later version.
LGPL v3 is formulated as an extension/modification of the GPL v3 license,
providing additional permissions.
You are free to choose the license for work that uses the Armadillo library (e.g. a proprietary application),
provided some conditions are met. Please see:
For clarifications as to how the LGPL license applies to Armadillo, see the
FAQ.