4.The most famous rough algebras are Rough Double Stone Algebra, Rough Nelson Algebra and Approximation Space Algebraof which the corresponding general algebras are regular double Stone algebra, semi-simple Nelson algebra and pre-rough algebra respectively.
5.Abstract: In this paper,we introduce notions ofregular ideals of a pseudocomplemented MS-algebra (PMS-algebra,for short) and study their elementary properies.We obtain some important results.
