Original sentence: A Galois connection is rather weaker than an isomorphism between the involved posets, but every Galois connection gives rise to an  isomorphism of certain sub-posets, as will be explained below.In mathematics, especially in order theory, a Galois connection is a particular correspondence between two partially ordered sets (posets)
Edited sentence: A Galois connection is rather weaker than an order isomorphism between the involved posets, but every Galois connection gives rise to an isomorphism of certain sub-posets, as will be explained below.In mathematics, especially in order theory, a Galois connection is a particular correspondence (typically) between two partially ordered sets (posets).The same notion can also be defined on preordered sets or classes; this article presents the common case of posets