Although all functionality provided by this package is mathematically trivial, the author thinks that having available a nice and easy-to-use implementation of residue classes as sets which permits to form unions, intersections and differences and which interacts smoothly with finite sets of elements w.r.t. these operations is often useful. The functionality of this package is used in a group theoretical context by the RCWA package written by the same author.
I would be grateful for any bug reports, comments or suggestions.
Stefan Kohl
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