This implements cubes and covers and their associated logic operations.
Licensed by Cornell University under GNU GPL v3.
Written by Ned Bingham. Copyright © 2020 Cornell University.
Haystack is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Haystack is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
A copy of the GNU General Public License may be found in COPYRIGHT. Otherwise, see https://www.gnu.org/licenses/.