摘要
设Ｓ是半群，ｘ１，ｘ２，…Ｓ且满足ｘｉ＋１ｘｉ＝ｘｉ，ｉ＝１，２……ｙ中的任意元素，记是ｓ的由Ｈ生成的最小右同余，本文证明了ｓ／ｐ（Ｈ）是平坦右Ｓ－系．
Let S be a monoid,and y,x1,x2, ... be in S such that Denote by p(H ) the right congruence generated by. We proved that the right S -act S/p(H ) is flat. As a corollary, the result of [4] follows directly, which says that,if x is a regular element of S, then S/p(yx,x ) is flat.
基金
国家自然科学基金!1950100
