For any pattern $p$ of length at most two, we provide generating functions and asymptotic approximations for the number of $p$-equivalence classes of Dyck paths with catastrophes, where two paths of the same length are $p$-equivalent whenever the positions of the occurrences of the pattern $p$ are the same.
翻译:对于在最多两条情况下长度为p美元的任何模式,我们提供产生功能和无症状近似值,以产生具有灾难的Dyck路等效等值的p美元,其中两条相同长度的路径,只要该模式的发生位置相同,则等于p美元。