I've seen a few questions at stack overflow related to finite field, which seem like they belong here, since they are questions about algorithms and/or implementations which are not language specific and could refer to software and/or hardware implementation.
However there is a tag for finite fields at
so perhaps finite field related questions should go there?
As an example case, someone posted a question at SO on how an AES inversion matrix and its inverse are generated. The required information for this was only partially there (also only partially there on several articles I found for this), and I had to resort to reverse engineering the matrices to determine the missing information and then explain how to create those matrices. Would the reverse engineering and/or derivation of those matrices qualify as an "algorithm", and belong in computer science or in math?
Link to the question and answer: