Ehresmann type rpp semigroups
MA He-cheng · Journal of Shandong University · 2005
Orthogroups are important semigroups in the class of regular semigroups.The class of Ehresmann type rpp semigroups in the class of rpp semigroups is introduced.Ehresmann type rpp semigroups are analogues of orthogroups in the class of rpp semigroups. Inaddition, some structure theorems of Ehresmann type rpp semigroups are given.