• Title/Summary/Keyword: 4-derivation

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ON 4-PERMUTING 4-DERIVATIONS IN PRIME AND SEMIPRIME RINGS

  • Park, Kyoo-Hong
    • The Pure and Applied Mathematics
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    • v.14 no.4
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    • pp.271-278
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    • 2007
  • Let R be a 2-torsion free semiprime ring. Suppose that there exists a 4-permuting 4-derivation ${\Delta}:R{\times}R{\times}R{\times}R{\rightarrow}R$ such that the trace is centralizing on R. Then the trace of ${\Delta}$ is commuting on R. In particular, if R is a 3!-torsion free prime ring and ${\Delta}$ is nonzero under the same condition, then R is commutative.

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Derivation of the SGP4 Drag Term from the Two Osculating Orbit State for the Low Earth Orbit Satellite

  • Lee, Byoung-Sun;Park, Jae-Woo
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.33.5-33
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    • 2002
  • $\textbullet$ NORAD SGP4 Model $\textbullet$ Conversion of the Osculating Orbit State into the NORAD TLE $\textbullet$ Derivation of the SGP4 Drag Term $\textbullet$ Conversion of the KOMPSAT-1 Orbit $\textbullet$ Effect of the SGP4 Drag Term $\textbullet$ Derivation of the KOMPSAT-1 B* Value $\textbullet$ Figure. Derived B* Values from KOMPSAT-1 MAPS Orbit state with considering the argument of latitude.

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THE RANGE INCLUSION RESULTS FOR ALGEBRAIC NIL DERIVATIONS ON COMMUTATIVE AND NONCOMMUTATIVE ALGEBRAS

  • Toumi, Mohamed Ali
    • The Pure and Applied Mathematics
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    • v.20 no.4
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    • pp.243-249
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    • 2013
  • Let A be an algebra and D a derivation of A. Then D is called algebraic nil if for any $x{\in}A$ there is a positive integer n = n(x) such that $D^{n(x)}(P(x))=0$, for all $P{\in}\mathbb{C}[X]$ (by convention $D^{n(x)}({\alpha})=0$, for all ${\alpha}{\in}\mathbb{C}$). In this paper, we show that any algebraic nil derivation (possibly unbounded) on a commutative complex algebra A maps into N(A), where N(A) denotes the set of all nilpotent elements of A. As an application, we deduce that any nilpotent derivation on a commutative complex algebra A maps into N(A), Finally, we deduce two noncommutative versions of algebraic nil derivations inclusion range.

SEMIPRIME NEAR-RINGS WITH ORTHOGONAL DERIVATIONS

  • Park, Kyoo-Hong;Jung, Yong-Soo
    • The Pure and Applied Mathematics
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    • v.13 no.4 s.34
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    • pp.303-310
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    • 2006
  • M. $Bre\v{s}ar$ and J. Vukman obtained some results concerning orthogonal derivations in semiprime rings which are related to the result that is well-known to a theorem of Posner for the product of two derivations in prime rings. In this paper, we present orthogonal generalized derivations in semiprime near-rings.

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Tetrahedral Frameworks of Silicate ; Derivation of Structures (규산염 강목구조;구조의 유도)

  • 정수진
    • Journal of the Korean Ceramic Society
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    • v.14 no.4
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    • pp.242-247
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    • 1977
  • By means of coloring of plane nets a number of different tetrahedral frameworks can be derived. With the aid of this method all tetrahedral framework structures which built up of layer structures with 2, 4, 8 tetrahedra per unit cell and 6-membered ring or 4-8-membered ring are given. For the systematic derivation of all possible structures, graph theory may be introduced.

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