Torelli theorem for the moduli space of framed bundles

被引:4
|
作者
Biswas, I. [1 ]
Gomez, T. [2 ,3 ]
Munoz, V. [2 ,3 ]
机构
[1] Tata Inst Fundamental Res, Sch Math, Bombay 400005, Maharashtra, India
[2] CSIC UAM UC3M UCM, Inst Ciencias Matemat, Madrid 28006, Spain
[3] Univ Complutense Madrid, Fac Ciencias Matemat, E-28040 Madrid, Spain
关键词
STABLE VECTOR-BUNDLES; ALGEBRAIC-CURVES; SYSTEMS;
D O I
10.1017/S0305004109990417
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let X be an irreducible smooth complex projective curve of genus g >= 2, and let x is an element of X be a fixed point. Fix r > 1, and assume that g > 2 if r = 2. A framed bundle is a pair (E, phi), where E is coherent sheaf on X of rank r and fixed determinant xi, and phi: E-x > C-r is a non-zero homomorphism. There is a notion of (semi)stability for framed bundles depending on a parameter tau > 0, which gives rise to the moduli space of tau-semistable framed bundles M-tau. We prove a Torelli theorem for M-tau, for tau > 0 small enough, meaning, the isomorphism class of the one pointed curve (X, x), and also the integer r, are uniquely determined by the isomorphism class of the variety M-tau.
引用
收藏
页码:409 / 423
页数:15
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