This is the license for the software package Nauty and
Traces, package versions 2.6r3 and later.

Five categories of software are included in the package:
A. All files not listed as B-E below, copyright Brendan McKay (1984-)
B. Files traces.h, traces.c and dretodot.c, copyright Adolfo Piperno (2008-)
C. File watercluster2.c, copyright Gunnar Brinkmann (2009-)
D. Files planarity.h and planarity.c, copyright Magma project.
E. Files nautycliquer.h and nautycliquer.c, copyright to Sampo
   Niskanen and Patric Östergård.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this software except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Brendan McKay: Australian National University; Brendan.McKay@anu.edu.au
Adolfo Piperno: University of Rome "Sapienza"; piperno@di.uniroma1.it
Gunnar Brinkmann: University of Ghent; Gunnar.Brinkmann@UGent.be
Magma Administration: University of Sydney; admin@maths.usyd.edu.au
Patric Ostergard: Aalto Univerity; patric.ostergard@aalto.fi

---END-OF-FORMAL-COPYRIGHT-NOTICE---

Earlier (pre-2.6) versions of this package carried a different
notice: "Permission is hereby given for use and/or distribution
with the exception of sale for profit or application with nontrivial
military significance." These days most people use nauty via a
larger package such as Magma, Sage, or GAP, and often they don't
even know they are using nauty. Due to the legal nonsense that
large package distributors need to worry about, it has proved too
much trouble to maintain an idiosyncratic licence. I didn't change
my opinion about military use, but it is no longer part of the
formal notice. Brendan McKay (Jan 20, 2016)