论文标题
通过中央元素的共生品种
Coextensive varieties via Central Elements
论文作者
论文摘要
在本文中，我们使用中央元素理论来为共同品种提供特征。特别是，如果该品种是有限类型的，那么一致性 - 可渗透性及其直接不可分解的成员的类别是通用的，那么共延迟性等同于各种壳。
In this paper we use the theory of central elements in order to provide a characterization for coextensive varieties. In particular, if the variety is of finite type, congruence-permutable and its class of directly indecomposable members is universal, then coextensivity is equivalent to be a variety of shells.
