Rings of Invariant Module Type and Automorphism-Invariant Modules
Rings of Invariant Module Type and Automorphism-Invariant Modules
A module is called automorphism-invariant if it is invariant under any automorphism of its injective hull.In [Algebras for which every indecomposable right module is invariant in its injective envelope, Pacific J. Math., vol.31, no. 3 (1969), 655-658] Dickson and Fuller had shown that if R is a finite-dimensional algebra over …