Recognizing Units in Number Fields
نویسنده
چکیده
We present a deterministic polynomial-time algorithm that decides whether a power product n¿=i ff is a umt m tne ring of integers of K , where K isa number field, y, are nonzero elements of K and n¡ are rational integers. The main algorithm is based on the factor refinement method for ideals, which might be of independent interest.
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