On Weil Numbers in Cyclotomic Fields
  In this note, we investigate the p-adic behavior of Weil numbers in the cyclotomic $\mathbb Z\_p$-extension of $\mathbb Q(\zeta\_p).$ We determlne the characteristic ideal of the quotient of semi-local units by Weil numbers in terms of the characteristic ideals of some classical modules that appear in Iwasawa Theory. 
Bruno Angles (LMNO), Tatiana Beliaeva (LMNO)