ON CERTAIN FUNCTIONAL EQUATION IN SEMIPRIME RINGS AND STANDARD OPERATOR ALGEBRAS
The main purpose of this paper is to prove the following result, which is related to a classical result of Chernoff. Let X be a real or complex Banach space, let L (X) be the algebra of all bounded linear operators on X and let A(X) C L (X) be a standard operator algebra. Suppose there exists a line...
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| Autor principal: | |
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| Lenguaje: | English |
| Publicado: |
Universidad de La Frontera. Departamento de Matemática y Estadística.
2014
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-06462014000100007 |
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| Sumario: | The main purpose of this paper is to prove the following result, which is related to a classical result of Chernoff. Let X be a real or complex Banach space, let L (X) be the algebra of all bounded linear operators on X and let A(X) C L (X) be a standard operator algebra. Suppose there exists a linear mapping D : A (X) ͢ L (X) satisfying the relation 2D (An) = D (An-1) A+An-1 D (A) + D (A) An-1+ AD (An-1) for all A e A (X), where n > 2 is some fixed integer. In this case D is of the form D (A) = [A, B] for all A e A (X) and some fixed B e L (X), which means that D is a linear derivation. In particular, D is continuous. |
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