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arXiv 1006.0632math.QAmath.RT
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簇代数的周期性与双对数恒等式

Periodicities in cluster algebras and dilogarithm identities

Tomoki Nakanishi

摘要:

我们考虑了簇代数中突变的两种周期性。对于交换矩阵是周期性的任何突变序列,我们定义了相关的T-和Y-系统。当序列是“正则的”时,它们是已知的“经典的”T-和Y-系统的特别自然的推广。此外,对于任何序列的突变下,种子是周期性的,我们制定了相关的双对数身份。证明了交换矩阵是斜对称时的恒等式。

英文摘要:

We consider two kinds of periodicities of mutations in cluster algebras. For any sequence of mutations under which exchange matrices are periodic, we define the associated T- and Y-systems. When the sequence is `regular', they are particularly natural generalizations of the known `classic' T- and Y-systems. Furthermore, for any sequence of mutations under which seeds are periodic, we formulate the associated dilogarithm identity. We prove the identities when exchange matrices are skew symmetric.

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