关于图的雅可比不变量
Invariant d'Hermite des jacobiennes de graphes pondérés
摘要:
任何第一个贝蒂数b的加权图都自然地与一个维数为b的格相关联,以类似于黎曼曲面的雅可比矩阵的方式确定。这类由图生成的格特别有趣。我们显示在这里的一个上界的埃尔米特不变量的这样一个格根据b的顺序是ln b。这个顺序是最优的:它是由系统经济图的雅可比矩阵的Hermite不变量实现的。
英文摘要:
To any weighted graph of first Betti number b is naturally associated a lattice of dimension b, definite in a similar way that the jacobian for a Riemann surface. This class of lattices generated by graphs is particularly interesting. We show here an upperbound of the Hermite invariant of such a lattice according to b whose order is ln b. This order is optimal : it is realized by the Hermite invariant of the jacobian of a systolicly economic graph.
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