• Title/Summary/Keyword: representable

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On Representable Rings and Modules

  • Mousavi, Seyed Ali;Mirzaei, Fatemeh;Nekooei, Reza
    • Kyungpook Mathematical Journal
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    • v.62 no.3
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    • pp.407-423
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    • 2022
  • In this paper, we determine the structure of rings that have secondary representation (called representable rings) and give some characterizations of these rings. Also, we characterize Artinian rings in terms of representable rings. Then we introduce completely representable modules, modules every non-zero submodule of which have secondary representation, and give some necessary and sufficient conditions for a module to be completely representable. Finally, we define strongly representable modules and give some conditions under which representable module is strongly representable.

THE NEARLY HENSTOCK-STIELTJES REPRESENTABLE OPERATORS

  • Yoon, Ju Han;Park, Jae Myung;Lee, Deok Ho;Kim, Byeong Moo
    • Journal of the Chungcheong Mathematical Society
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    • v.12 no.1
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    • pp.179-186
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    • 1999
  • In this paper, we define the Henstock-Stieltjes representable and nearly Henstock-Stieltjes representable operators for vector-valued function, which are the generalizations of Pettis representable operator and then study some properties of these operators.

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ON THE PETTIS-DIVISOR PROPERTY FOR DUNFORD-PETTIS OPERATORS

  • SUNG-JIN CHO;CHUN KEE PARK
    • Communications of the Korean Mathematical Society
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    • v.13 no.4
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    • pp.775-780
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    • 1998
  • In this paper it is shown that Dunford-Pettis operators obey the "Pettis-divisor property": if T is a Dunford-Pettis operator from $L_1$($\mu$) to a Banach space X, then there is a non-Pettis representable operator S : $L_1$($\mu$)longrightarrow$L_1$($\mu$) such that To S is Pettis representable.

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THE NEARLY $H_1$-STIELTJES REPRESENTABLE OPERATORS

  • Yoon, Ju-Han
    • The Pure and Applied Mathematics
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    • v.8 no.1
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    • pp.53-59
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    • 2001
  • In this paper, we define the $H_1$-Stieltjes representable, nearly $H_1$-Stieltjes represnetable for vector-valued function, which is the generalization of Bochner representable and than study some properties of these operators.

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ON C-STIELTJES INTEGRAL OF BANACH-VALVED FUNCTIONS

  • Zhang, Xiaojie;Zhao, Dafang;Ye, Guoju
    • The Pure and Applied Mathematics
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    • v.14 no.2 s.36
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    • pp.71-84
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    • 2007
  • In this paper, we define the C-Stieltjes integral of the functions mapping an interval [a,b] into a Banach space X with respect to g on [a,b], and the C-Stieltjes representable operators for the vector-valued functions which are the generalizations of the Henstock-Stieltjes representable operators. Some properties of the C-Stieltjes operators and the convergence theorems of the C-Stieltjes integral are given.

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An Analysis of Elementary Students' Selection of Representable Value and Confident Method That Appear in Measuring Activities (측정과 관련된 실험 활동에서 보이는 초등학생의 대푯값 선정 및 신뢰 방법 분석)

  • Yang, Il-Ho;Lim, Sung-Man;Lim, Jae-Keun;Song, Jin-Lyoung
    • Journal of Korean Elementary Science Education
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    • v.28 no.3
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    • pp.263-276
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    • 2009
  • The purpose of this study was to analyze the elementary students' selection of representable value and confident method that appear in measuring activities by using a microgenetic method. The participants were seven elementary students in the fourth grade. They performed the same measuring activities six times for the study period. Data were collected by interview and observation with their activity recording papers and video tape transcription. Their activities were recorded and documented for the analysis. Results were as follows. First, in the time measuring activity, elementary students developed desirably as their measuring experience increased, for example they selected a representable value in use of a repeated measurement and used a various method in the domain of a time measurement and they showed an increase of a quantitative observation in the volume domain except in the length domain. Second, in a confident method of a representable value, though they must rely upon a repeated measurement, they only measure repeatedly in the time domain. Also in the time domain, it doesn't get accomplished a exact confidence of a representable value at a shortage of skill about a measurement. Accordingly this study will be implications for teachers to teach a handling abilities of measuring instruments to elementary students and to be promote understanding a nature of measurement.

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COLOCALIZATION OF GENERALIZED LOCAL HOMOLOGY MODULES

  • Hatamkhani, Marziyeh
    • Bulletin of the Korean Mathematical Society
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    • v.59 no.4
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    • pp.917-928
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    • 2022
  • Let R be a commutative Noetherian ring and I an ideal of R. In this paper, we study colocalization of generalized local homology modules. We intend to establish a dual case of local-global principle for the finiteness of generalized local cohomology modules. Let M be a finitely generated R-module and N a representable R-module. We introduce the notions of the representation dimension rI(M, N) and artinianness dimension aI(M, N) of M, N with respect to I by rI(M, N) = inf{i ∈ ℕ0 : HIi(M, N) is not representable} and aI(M, N) = inf{i ∈ ℕ0 : HIi(M, N) is not artinian} and we show that aI(M, N) = rI(M, N) = inf{rIR𝔭 (M𝔭,𝔭N) : 𝔭 ∈ Spec(R)} ≥ inf{aIR𝔭 (M𝔭,𝔭N) : 𝔭 ∈ Spec(R)}. Also, in the case where R is semi-local and N a semi discrete linearly compact R-module such that N/∩t>0ItN is artinian we prove that inf{i : HIi(M, N) is not minimax}=inf{rIR𝔭 (M𝔭,𝔭N) : 𝔭 ∈ Spec(R)\Max(R)}.