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Two More Radicals for Right Near-Rings: The Right Jacobson Radicals of Type-1 and 2
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  • Two More Radicals for Right Near-Rings: The Right Jacobson Radicals of Type-1 and 2
저자명
Rao. Ravi Srinivasa,Prasad. K. Siva
간행물명
Kyungpook mathematical journal
권/호정보
2006년|46권 4호|pp.603-613 (11 pages)
발행정보
경북대학교 자연과학대학 수학과
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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Near-rings considered are right near-rings and R is a near-ring. $J_0^r(R)$, the right Jacobson radical of R of type-0, was introduced and studied by the present authors. In this paper $J_1^r(R)$ and $J_2^r(R)$, the right Jacobson radicals of R of type-1 and type-2 are introduced. It is proved that both $J_1^r$ and $J_2^r$ are radicals for near-rings and $J_0^r(R){subseteq}J_1^r(R){subseteq}J_2^r(R)$. Unlike the left Jacobson radical classes, the right Jacobson radical class of type-2 contains $M_0(G)$ for many of the finite groups G. Depending on the structure of G, $M_0(G)$ belongs to different right Jacobson radical classes of near-rings. Also unlike left Jacobson-type radicals, the constant part of R is contained in every right 1-modular (2-modular) right ideal of R. For any family of near-rings $R_i$, $i{in}I$, $J_{ u}^r({oplus}_{i{in}I}R_i)={oplus}_{i{in}I}J_{ u}^r(R_i)$, ${ u}{in}{1,2}$. Moreover, under certain conditions, for an invariant subnear-ring S of a d.g. near-ring R it is shown that $J_2^r(S)=S{cap}J_2^r(R)$.