Gluing Stability Conditions
Gluing Stability Conditions
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粘合稳定性条件
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
A. Polishchuk
中科院分区:
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作者:
John Collins;A. Polishchuk
Stability conditions Definition. A stability condition σ is given by a pair (Z, P ), where Z : K0(D) → C is a homomorphism from the Grothendieck group K0(D) of D, and P is a slicing. Such a slicing is given by a collection of subcategories P (φ) of semistable objects of phase φ for each φ ∈ R, where Hom(P (φ1), P (φ2)) = 0 for φ1 > φ2, and P (φ)[1] = P (φ + 1). For an object E ∈ P (φ) we will use the notation φ(E) = φ. Similarly to the case of vector bundles, for each object E of D there should exist a Harder-Narasimhan filtration (HN-filtration), i.e., a collection of exact triangles building E from the semistable factors E1, . . . , En (called the HN-factors of E), where φ(E1) > . . . > φ(En) (E1 → E is an analog of the subbundle of maximal phase, etc.).