Gorenstein homological dimensions for triangulated categories

Gorenstein homological dimensions for triangulated categories
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三角类别的 Gorenstein 同调维度

DOI:
10.1016/j.jalgebra.2014.03.037
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发表时间:
2014-07
期刊:
影响因子:
0.9
通讯作者:
Liu Zhongkui
Liu Zhongkui
中科院分区:
数学3区
文献类型:
--
作者:
Ren Wei;Liu Zhongkui

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设C是一个三角化范畴,它有一个真三角形类E. Asadollahi和Salarian在C.本文进一步研究了三角范畴的Gorenstein同调维数。首先,我们讨论了E-G投射维数和E-G内射维数的有限性。然后定义了E-Gorenstein导函子GExt Ei(-,-),并通过这类函子的消失刻画了C中对象的E-G投射维数和E-G内射维数.因此,我们可以证明等式sup {E-G pd M|对于任意M∈ C}= sup {E-G id M|对任意M∈ C},定义了C的整体E-Gorenstein维数.最后,构造了C中具有有限E-G投影维数的物体的E-G幻影塔和E-G蜂窝塔。
Let C be a triangulated category with a proper class E of triangles. Asadollahi and Salarian introduced and studied E-G projective and E-G injective objects, and developed a relative homological algebra in C. In this paper, we further study Gorenstein homological dimensions for triangulated categories. First, we discuss the finiteness of E-G projective and E-G injective dimensions. Then we define E-Gorenstein derived functors GE xt E i (−,−), and characterize E-G projective and E-G injective dimensions of objects in C by vanishing of such functors. Consequently we can prove the equality sup {E-G pd M| for any M∈ C}= sup {E-G id M| for any M∈ C}, which is used to define the global E-Gorenstein dimension of C. Finally, E-G phantom tower and E-G cellular tower for objects in C with finite E-G projective dimension are constructed.
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