Geodesic
On ($\sigma$-$\delta$)-rings over Noetherian rings
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2016), pp. 3-11

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For a ring $R$, an endomorphism $\sigma$ of $R$ and a $\sigma$-derivation $\delta$ of $R$, we introduce ($\sigma$-$\delta$)-ring and ($\sigma$-$\delta$)-rigid ring which are the generalizations of $\sigma(*)$-rings and $\delta$-rings, and investigate their properties. Moreover, we prove that a ($\sigma$-$\delta$)-ring is $2$-primal and its prime radical is completely semiprime. 
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     title = {On ($\sigma$-$\delta$)-rings over {Noetherian} rings},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
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Vijay Kumar Bhat; Meeru Abrol; Latif Hanna; Maryam Alkandari. On ($\sigma$-$\delta$)-rings over Noetherian rings. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2016), pp. 3-11. http://geodesic.mathdoc.fr/item/BASM_2016_3_a0/