What does the community think about this class, the RationalFunction ? Do add ideas from your knowledge and experience also.
I think having such a class would be advantageous. My project deals with (very small) matrices of rational functions, and I currently convert them to polys and cancel by hand in intermediate steps. I think working with a dedicated rational function class all the time might be advantageous.
However I'm not sure RationalFunction should store a pair of Polys, but rather wrap DMFs. OTOH Mateusz surely knows better whether/how to do this.
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