👉 In the context of mathematics, "pech" is a notation used to denote a finite group. In abstract algebra and group theory, it refers to a specific type of group, specifically the cyclic groups of prime power order. These are the groups that can be generated by a single element (the identity element) under multiplication in such a way that every other element has an inverse. The notation "pech" is used to denote the structure of these groups and their properties.