By employing the knowledge(R-element equivalence class)in one direction Srough sets and dual of one direction S-rough sets,the concept of knowledge law is given
A new kinetic spectrophotometric method has been developed for the determination of iron (Ⅲ). The method is based on the catalytic effect of iron (Ⅲ) on the o
The Γα-group inverse and the Γα-sharp ordering in matrix set are introduced.Some characterizations and properties of the Γα-sharp ordering are given.The r