Classifications of quasitrivial semigroups
arXiv:1811.11113 · doi:10.1007/s00233-020-10087-5
Abstract
We investigate classifications of quasitrivial semigroups defined by certain equivalence relations. The subclass of quasitrivial semigroups that preserve a given total ordering is also investigated. In the special case of finite semigroups, we address and solve several related enumeration problems.