Facultad de Ciencias Exactas, NUCOMPA
Abstract: Our aim is to characterize the class $D(\sigma)$ of $\sigma$-derivations on finite matrix algebras. Nevertheless the full description of $\sigma$-derivations is quite difficult, even in the finite dimensional case, the problem has its own interest. We will prove that $D(\sigma)$ consists of the solution of some linear system of matrix equations. Some posed questions concerning the structure of $\sigma$-derivations will also be considered.
Keywords: $\sigma$-derivations. Matrix algebras. Algebraic homomorphisms. Linear system of matricial equations
Classification (MSC2000): 47B47; 47B48
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