1.Steklov Mathematical Institute of the Russian Academy of Sciences,Moscow,Russia;2.Higher School of Economics,National Research University,Moscow,Russia;3.Department of Mathematics,Pennsylvania State University,University Park,USA
Abstract:
We classify the types of root systems R in the rings of integers of number fields K such that the Weyl group W(R) lies in the group generated by Aut(K) and multiplications by the elements of K*.