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| ATIYAH INVARIANT, HIRZEBRUCH SUM AND PELLIAN EQUATION | |
| 作者姓名： | 陆洪文 |
| 基金项目： | The project was supported by NNSF of China. |
| 摘 要： | The main result of this note is as follows: Let M=∈SL(2,Z) be hyperbolic. Then the Atiyah's invariant η(M)=-sign (trac (M))|m (M) Ψ_o (M), whore m(Mr) is the index of M in the stable subgroup for of the PSL (2, Z), and Ψ_o(M) =1/3Ψ(α). |
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