License
The ZEN library was primarly built on top of
packages for big integer arithmetic.
- Version 1.0 of the library was built on top of the BigNum package, a
licensed product
by Digital Equipment Corporation & INRIA. Due to this license, the first version of ZEN was not widely distributed.
- Beginning with version 2.0, the GNU Multiprecision library, GMP (distributed under the
GNU library general public license) could be used instead but support for BigNum was still there. The license of those version was therefore as follows:
The ZEN library can be freely redistributed for non commercial usage
provided the above licenses are not violated. It is provided as is
with no warranty of correctness or efficiency. As mentioned above,
we shall in no event be liable for any indirect, incidental or
consequential damages resulting from its use. You may copy the zen
package in whole or in part as long as you don't try to make money
from it, or pretend that you wrote it, or make commercial use of it.
Commercial use is subject to authorization.
- Since version 3.0 the ZEN library no more uses an underlying external multiprecision package. The whole package is now distributed under the GNU general public license.
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