2 citations · 5 across the 9 of their papers we have counts for
Showing 2016 · math.GRShow all
3 papers · 2 filters
math.GR2016
Closed inverse subsemigroups of graph inverse semigroups
Amal AlAli, N. D. Gilbert
As part of his study of representations of the polycylic monoids, M.V. Lawson described all the closed inverse submonoids of a polycyclic monoid and classified them up to con…
math.GR2016★ 1 cited
Inverse subsemigroups of finite index in finitely generated inverse semigroups
Amal AlAli, N. D. Gilbert
The index of a subgroup of a group counts the number of cosets of that subgroup. A subgroup of finite index often shares structural properties with the group, and the existence of…
math.GR2016
Ordered groupoid quotients and congruences on inverse semigroups
Nouf AlYamani, N. D. Gilbert
We introduce a preorder on an inverse semigroup associated to any normal inverse subsemigroup , that lies between the natural partial order and Green's -relati…