GCD and LCM-like identities for ideals in commutative rings
GCD and LCM-like identities for ideals in commutative rings
复制标题
交换环中理想的 GCD 和类 LCM 恒等式
DOI:
10.1142/s0219498816500109
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发表时间:
2015
影响因子:
0.8
通讯作者:
Yasuo Ohno and Manabu Ozaki
中科院分区:
文献类型:
--
作者:
Daniel D. Anderson;Shuzo Izumi;Yasuo Ohno and Manabu Ozaki
Let A1,…,An(n ≥ 2) be ideals of a commutative ring R. Let G(k) (resp., L(k)) denote the product of all the sums (resp., intersections) of k of the ideals. Then we have $$L(n)G(2)G(4)\cdots G(2\lfloor n/2\rfloor ) \subseteq G(1)G(3)\cdots G(2\lceil n/2 \rceil -1).$$ In the case R is an arithmetical ring we have equality. In the case R is a Prüfer ring, the equality holds if at least n - 1 of the ideals A1,…,Anare regular. In these two cases we also have $$G(n)L(2)L(4)\cdots L(2\lfloor n/2 \rfloor ) = L(1)L(3)\cdots L(2\lceil n/2 \rceil -1).$$ Related equalities are given for Prüfer v-multiplication domains and formulas relating GCD's and LCM's in a GCD domain generalizing gcd(a1, a2)lcm(a1, a2) = a1a2are given.