论文标题

P-airy分布

The p-Airy distribution

论文作者

Caracciolo, Sergio, Erba, Vittorio, Sportiello, Andrea

论文摘要

在本手稿中,我们考虑了配备均匀度量的戴克路径集,我们研究了可观察到的“戴克路径下方”的变形的统计特性,因为该路径的尺寸$ n $是无穷大的。 The deformation under analysis is apparently new: while usually the area is constructed as the sum of the heights of the steps of the Dyck path, here we regard it as the sum of the lengths of the connected horizo​​ntal slices under the path, and we deform it by applying to the lengths of the slices a positive regular function $ω(\ell)$ such that $ω(\ell) \sim \ell^p$ for large argument.范式的这种转移是由在随机组合优化中应用于欧几里得随机分配问题的动机,以及代数组合中的树钩公式。 对于$ p \ in \ mathbb {r}^+ \ smallSetMinus \ left \ {\ frac {\ frac {\ frac {1} {2} {2} \ right \} $,我们通过计算函数$ω(\ ell)的范围来表征变形区域的统计属性,以确定一般范围,以确定函数$ω(\ ell)的一般范围 - 分配,由于takác​​s。变形区域的分布的大多数属性都是\ emph {Universal},这意味着它们取决于变形参数$ p $,但不取决于功能$ω(\ ell)$的显微镜细节。我们称\ emph {$ p $ - airy Distribution}这个通用分布家族。

In this manuscript we consider the set of Dyck paths equipped with the uniform measure, and we study the statistical properties of a deformation of the observable "area below the Dyck path" as the size $N$ of the path goes to infinity. The deformation under analysis is apparently new: while usually the area is constructed as the sum of the heights of the steps of the Dyck path, here we regard it as the sum of the lengths of the connected horizontal slices under the path, and we deform it by applying to the lengths of the slices a positive regular function $ω(\ell)$ such that $ω(\ell) \sim \ell^p$ for large argument. This shift of paradigm is motivated by applications to the Euclidean Random Assignment Problem in Random Combinatorial Optimization, and to Tree Hook Formulas in Algebraic Combinatorics. For $p \in \mathbb{R}^+ \smallsetminus \left\{ \frac{1}{2}\right\}$, we characterize the statistical properties of the deformed area as a function of the deformation function $ω(\ell)$ by computing its integer moments, finding a generalization of a well-known recursion for the moments of the area-Airy distribution, due to Takács. Most of the properties of the distribution of the deformed area are \emph{universal}, meaning that they depend on the deformation parameter $p$, but not on the microscopic details of the function $ω(\ell)$. We call \emph{$p$-Airy distribution} this family of universal distributions.

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