Non-unique factorization and principalization in number fields

Details Non-unique factorization and principalization in number fields Non-unique factorization and principalization in number fields

2011-02-10

arxiv.org/abs/1102.2255v1

Mathematics

Number Theory

to appear in Proceedings of the AMS

Scientific paper

We give a precise description of how the class group of a number field measures the failure of unique factorization in its ring of integers. Specifically, following ideas of Kummer, we determine the structure of all irreducible factorizations of an element in the ring of integers of a number field, and give a combinatorial description for the number of such factorizations. In certain cases, we show how quadratic forms can explicitly provide all such factorizations.

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