arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.2724math.PRmath.AC
收藏

交换生灭过程

Commuting birth-and-death processes

Steven N. Evans, Bernd Sturmfels, Caroline Uhler

摘要:

我们使用组合学和代数统计的方法来研究类似的出生和死亡的过程,作为他们的状态空间的有限子集的$m$维晶格和$m$矩阵,记录在每个晶格方向的转移概率成对交换。这样的过程受到关注的一个原因是转移阵直接对角化,因此容易计算$n$步骤转移概率。交换生灭过程的集合分解为复曲面簇的联合,其主要成分是最近邻转移概率为正的所有过程的闭包。我们表现出一个明确的单项参数化这个主要组成部分,我们探索边界组件使用准素分解。

英文摘要:

We use methods from combinatorics and algebraic statistics to study analogues of birth-and-death processes that have as their state space a finite subset of the $m$-dimensional lattice and for which the $m$ matrices that record the transition probabilities in each of the lattice directions commute pairwise. One reason such processes are of interest is that the transition matrix is straightforward to diagonalize, and hence it is easy to compute $n$ step transition probabilities. The set of commuting birth-and-death processes decomposes as a union of toric varieties, with the main component being the closure of all processes whose nearest neighbor transition probabilities are positive. We exhibit an explicit monomial parametrization for this main component, and we explore the boundary components using primary decomposition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑