universally maximal left ideal

In chapter 2, we give some properties of subidempotents, left regular ordered semigroups and maximal left ideals.

第二章给出有关序半群的子幂等元和左正则序半群以及极大左理想等的若干性质;利用极大左理想刻画无子幂等元,且任意真左理想是Archimedean(1-Archimedean)子半群的序半群。