Abstract Rough set theory over two universes is a generalization of rough set model to find accurate approximations for uncertain concepts in information systems in which uncertainty arises from existence of interrelations between the three basic sets: objects. attributes. and decisions. In this work. https://www.ealisboa.com/quick-buy-Acer-shirasawanum-Green-Snowflake-Weeping-Full-Moon-Japanese-Maple-great-pick/