The class group of all cyclotomic integers

The class group of all cyclotomic integers
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所有分圆整数的类群

DOI:
10.1016/0022-4049(81)90086-4
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发表时间:
1981
期刊:
影响因子:
--
通讯作者:
A. Brumer
A. Brumer
中科院分区:
--
文献类型:
--
作者:
A. Brumer

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对于每个nz 1,设σ i = e2 ni ′ n,σ i = Z [[,]]是分圆域Ki中具有n个单位根的整数环.我们表示0,= li,m On= Un在所有分圆整数的环上,直接极限取关于自然包含0,-O,对于n除m。对于任意交换环A,秩为1的投射模的同构类群通常记为Pit(A)。
For each nz 1, let &,= e2ni’n and let O,= Z [[,,] be the ring of integers in the cyclotomic field K, of nth roots of unity. We denote 0,= li, m On= Un On the ring of all cyclotomic integers, the direct limit being taken with respect to the natural inclusions 0,-O, for n dividing m. For any commutative ring A, the group of isomorphism classes of projective modules of rank 1 is denoted by Pit (A) as usual.