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arXiv math/0610435math.CTmath.KT
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三角范畴上的行列式函子

Determinant functors on triangulated categories

Manuel Breuning

摘要:

研究了定义在三角范畴上取值于Picard范畴的行列式函子。两个主要的结果是存在一个泛行列式函子的每一个小的三角范畴,和一个比较定理的行列式函子的三角范畴具有一个非退化的有界t-结构和行列式函子的心脏。对于小三角范畴T,我们利用T上的泛行列式函子给出了群K_0(T)和K_1(T)的自然定义,并证明了:当i=0和1时,若T具有心为E的非退化有界t-结构,则K_1(T)= K_1(E).

英文摘要:

We study determinant functors which are defined on a triangulated category and take values in a Picard category. The two main results are the existence of a universal determinant functor for every small triangulated category, and a comparison theorem for determinant functors on a triangulated category with a non-degenerate bounded t-structure and determinant functors on its heart. For a small triangulated category T we give a natural definition of groups K_0(T) and K_1(T) in terms of the universal determinant functor on T, and we show that K_i(T)=K_i(E) for i=0 and 1 if T has a non-degenerate bounded t-structure with heart E.

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