摘要
C.Levesque raised two questions on the index of his independent cyelotomic unitsystem in the whole unit group of Z[ζ_n+ζ_n].In this paper it is shown that the firstquestion has affirmative answer for n=p~αand n=p~αq~β,the second question has affirmativeanswer for n=p~α,but has negative answer for
C.Levesque raised two questions on the index of his independent cyelotomic unit system in the whole unit group of Z[ζ_n+ζ_n].In this paper it is shown that the first question has affirmative answer for n=p~αand n=p~αq~β,the second question has affirmative answer for n=p~α,but has negative answer for n=p~αq~β
