福建师范大学学报(自然科学版)
福建師範大學學報(自然科學版)
복건사범대학학보(자연과학판)
JOURNAL OF FUJIAN TEACHERS UNIVERSITY (NATURAL SCIENCE EDITION)
2010年
2期
1-4,46
,共5页
平坦维数%F_(n-)内射模%F_(n-)平坦模%几乎优越扩张
平坦維數%F_(n-)內射模%F_(n-)平坦模%幾乎優越擴張
평탄유수%F_(n-)내사모%F_(n-)평탄모%궤호우월확장
flat dimension%F_(n-)injective module%F_(n-)flat module%almost excellent extension
将具有平坦维数≤n的模类F_n引入研究F_(n-)内射模与F_(n-)平坦模,得到了wD(R)≤n,Fm=F_n,F_n=P_0,F_n=P1的等价刻画.在环的几乎优越扩张S≥R下,给出了F_(n-)内射模与F_(n-)平坦模的性质.
將具有平坦維數≤n的模類F_n引入研究F_(n-)內射模與F_(n-)平坦模,得到瞭wD(R)≤n,Fm=F_n,F_n=P_0,F_n=P1的等價刻畫.在環的幾乎優越擴張S≥R下,給齣瞭F_(n-)內射模與F_(n-)平坦模的性質.
장구유평탄유수≤n적모류F_n인입연구F_(n-)내사모여F_(n-)평탄모,득도료wD(R)≤n,Fm=F_n,F_n=P_0,F_n=P1적등개각화.재배적궤호우월확장S≥R하,급출료F_(n-)내사모여F_(n-)평탄모적성질.
Use the class of modules with flat dimensions ≤n to introduce and investigate F_(n-)injective modules and F_(n-)flat modules, and obtain some equivalent characterizations of the cases when wD(R)≤n, F_m=F_n,F_n=P_0 and F_n=P_1 respectively. Under an almost excellent extension of rings,give some properties of F_(n-)injective modules and F_(n-)flat modules.