The group of almost Riordan arrays contains the group of Riordan arrays as a subgroup. In this note, we exhibit examples of pseudo-involutions, conditions under which we define an involution, and methods of constructing quasi-involutions in the group of almost Riordan arrays.

中文翻译：

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关于伪对合，几乎Riordan数组组中的对合和拟对合

几乎是Riordan阵列的组包含Riordan阵列的组作为子组。在本注释中，我们展示了伪对合的示例，定义对合的条件以及在几乎Riordan数组组中构造拟对合的方法。