13C99 5 16D80 3 13C05 2 16U80 2 multiplication module 2 $J$-symmetric ring 1 03E75 1 11Y50 1 13A99 1 13C13 1 13C13‎ 1 13C99; Secondary 13E15 1 13E99 1 2-primal rings 1 20K20 1 20K30; 13C99 1 Black Box 1 Jacobson radical 1 Noetherian space 1 Primary 13A15 1 Rickart modules 1 Spectral space 1 \(E(R)\)-algebra 1 \(E\)-ring 1 abelian modules 1 central Armendariz rings 1 central reduced rings 1 central reversible rings 1 central semicommutative rings 1 central symmetric rings 1