ZHOU Jinming. Automorphisms of the commuting graph over 2×2 matrix ring[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2016,55(1):39-43. DOI: 10.13471/j.cnki.acta.snus.2016.01.007.
Let Γ(M) be the commuting graph of 2×2 matrix ring over a finite field. The compressed graph of Γ(M) is constructed and the relationship of the automorphism groups of these two graphs is studied
then all the automorphisms of Γ(M) are determined.