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When is every matrix over a ring the sum of two tripotents?When is every matrix over a ring the sum of two tripotents?
Retractable and coretractable modules in Wisbauer categoryA right R-module M is called: (1) retractable if HomR(M,N)≠0 for any non-zero submodule N of M; (2
When is every matrix over a ring the sum of two tripotents? that every square matrix over a field F is the sum of two tripotents if and only if F is a prime field
On rings with cyclic almost-injective modules cyclic right R-module is almost injective, if and only if R/J(R) is a right SV-ring with Loewy(RR) ≤ 2
Rings over which all modules are I0-modules. IIAll right R-modules are I0-modules if and only if either R is a right SV-ring or R/I(2) (R
On certain classes of rings of formal matrices© Allerton Press, Inc., 2015. We consider a problem on isomorphism of rings of formal matrices
Rings with x^n- x or x^n+x nilpotentRings with x^n- x or x^n+x nilpotent
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