• Title/Summary/Keyword: higher derivations

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JORDAN HIGHER LEFT DERIVATIONS AND COMMUTATIVITY IN PRIME RINGS

  • Park, Kyoo-Hong
    • Journal of the Chungcheong Mathematical Society
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    • v.23 no.4
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    • pp.741-748
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    • 2010
  • Let R be a 2-torsionfree prime ring. Our goal in this note is to show that the existence of a nonzero Jordan higher left derivation on R implies R is commutative. This result is used to prove a noncommutative extension of the classical Singer-Wermer theorem in the sense of higher derivations.

JORDAN HIGHER DERIVATIONS ON TRIVIAL EXTENSION ALGEBRAS

  • Vishki, Hamid Reza Ebrahimi;Mirzavaziri, Madjid;Moafian, Fahimeh
    • Communications of the Korean Mathematical Society
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    • v.31 no.2
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    • pp.247-259
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    • 2016
  • We first give the constructions of (Jordan) higher derivations on a trivial extension algebra and then we provide some sufficient conditions under which a Jordan higher derivation on a trivial extension algebra is a higher derivation. We then proceed to the trivial generalized matrix algebras as a special trivial extension algebra. As an application we characterize the construction of Jordan higher derivations on a triangular algebra. We also provide some illuminating examples of Jordan higher derivations on certain trivial extension algebras which are not higher derivations.

Continuity of Higher Derivations on Some Semiprime Banach Algebras

  • Lee, Young-Whan
    • Journal of the Chungcheong Mathematical Society
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    • v.2 no.1
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    • pp.37-44
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    • 1989
  • In this paper, it is shown that automatic continuity of derivations on some semi prime Banach algebras can be extended to higher derivations. In particular, we show that if every prime ideal is closed in a commutative semi prime Banach algebra then every higher derivation on it is continuous.

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HIGHER LEFT DERIVATIONS ON SEMIPRIME RINGS

  • Park, Kyoo-Hong
    • The Pure and Applied Mathematics
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    • v.17 no.4
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    • pp.355-362
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    • 2010
  • In this note, we extend the Bresar and Vukman's result [1, Proposition 1.6], which is well-known, to higher left derivations as follows: let R be a ring. (i) Under a certain condition, the existence of a nonzero higher left derivation implies that R is commutative. (ii) if R is semiprime, every higher left derivation on R is a higher derivation which maps R into its center.

SYSTEMS OF DERIVATIONS ON BANACH ALGEBRAS

  • Lee, Eun-Hwi
    • Communications of the Korean Mathematical Society
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    • v.12 no.2
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    • pp.251-256
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    • 1997
  • We show that a strong system of derivations ${D_0, D_1,\cdots,D_m}$ on a commutative Banach algebra A is contained in the radical of A if it satisfies one of the following conditions for separating spaces; (1) $\partial(D_i) \subseteq rad(A) and \partial(D_i) \subseteq K D_i(rad(A))$ for all i, where $K D_i(rad(A)) = {x \in rad(A))$ : for each $m \geq 1, D^m_i(x) \in rad(A)}$. (2) $(D^m_i) \subseteq rad(A)$ for all i and m. (3) $\bar{x\partial(D_i)} = \partial(D_i)$ for all i and all nonzero x in rad(A).

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