Let R be a commutative ring with identity, let a be a none zero element of R, this
paper deals with a new definition for a multiplicative closed set Sa= { a ′ε R: a = aa′}
of the ring R, we prove some properties of this set. In [1] we give and study the
definition of S1 ideal, in [2] we give and study the definition of S2 ideal while in this
work we introduce the ring Rsa,the localization of R at Sa. We prove the following
result among others, the principal ideal ‹a› is S1ideal of R if, and only if the principal
ideal ‹a⁄a′› is s1 ideal of the ring Rsa. We also prove that the principal ideal ‹a› is S2
ideal of R if, and only if the principal ideal ‹a⁄a′› is S2 ideal of Rsa.
Let R be a commutative ring with identity, let a be a none zero element of R, thispaper deals with a new definition for a multiplicative closed set Sa= { a ′ε R: a = aa′}of the ring R, we prove some properties of this set. In [1] we give and study thedefinition of S1 ideal, in [2] we give and study the definition of S2 ideal while in thiswork we introduce the ring Rsa,the localization of R at Sa. We prove the followingresult among others, the principal ideal ‹a› is S1ideal of R if, and only if the principalideal ‹a⁄a′› is s1 ideal of the ring Rsa. We also prove that the principal ideal ‹a› is S2ideal of R if, and only if the principal ideal ‹a⁄a′› is S2 ideal of Rsa.
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