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arXiv 1802.05147math.PRmath.CAmath.RT
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BC型超几何函数随机游动的中心极限定理

Some central limit theorems for random walks associated with hypergeometric functions of type BC

Merdan Artykov, Michael Voit

摘要:

当双陪集空间与某个B型Weyl腔相同时,实数或复数上的非紧Grassmann流形或秩为q、维数为p的四元数上的非紧Grassmann流形的球面函数可看作BC型Heckman-Opdam超几何函数.通过Rösler的一个结果,相关的双陪集超群可以嵌入到交换超群的连续族中,这些超几何函数作为乘性函数,p在某个连续参数范围内.第二作者最近导出了与这些超群有关的随机游动的几个极限定理。我们在这里提出进一步的极限定理,特别是对于时间参数以及p趋于无穷大的情况。对于整数p,这些结果承认解释群不变的随机游动的格拉斯曼流形。

英文摘要:

The spherical functions of the noncompact Grassmann manifolds over the real or complex numbers or the quaternions with rank q and dimension parameter p can be seen as Heckman-Opdam hypergeometric functions of type BC, when the double coset space is identified with some Weyl chamber of type B. The associated double coset hypergroups may be embedded into a continuous family of commutative hypergroups with these hypergeometric functions as multiplicative functions with p in some continuous parameter range by a result of Rösler. Several limit theorems for random walks associated with these hypergroups were recently derived by the second author. We here present further limit theorems in particular for the case where the time parameter as well as p tend to infinity. For integers p, these results admit interpretations for group-invariant random walks on the Grassmann manifolds.

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