• 제목/요약/키워드: economics mathematics

검색결과 194건 처리시간 0.027초

SUBORDINATION RESULTS FOR CERTAIN SUBCLASSES BY USING INTEGRAL OPERATOR DEFINED IN THE SPACE OF ANALYTIC FUNCTIONS

  • Sakar, F. Muge;Guney, H. Ozlem
    • 호남수학학술지
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    • 제40권2호
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    • pp.315-323
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    • 2018
  • In this study, firstly we introduce generalized differential and integral operator, also using integral operator two classes are presented. Furthermore, some subordination results involving the Hadamard product (Convolution) for these subclasses of analytic function are proved. A number of consequences of some of these subordination results are also discussed.

CONSUMPTION-LEISURE CHOICE WITH STOCHASTIC INCOME FLOW

  • Lee, Ho-Seok;Lim, Byung Hwa
    • 충청수학회지
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    • 제33권1호
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    • pp.103-112
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    • 2020
  • This paper investigates the portfolio selection problem with flexible labor choice and stochastic income flow where the unit wage flow is governed by a stochastic process. The agent optimally chooses consumption, investment, and labor supply. We derive the closed-form solution by applying a martingale method even with the stochastic income flow.

FINITE GROUPS WITH A CYCLIC NORM QUOTIENT

  • Wang, Junxin
    • 대한수학회보
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    • 제53권2호
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    • pp.479-486
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    • 2016
  • The norm N(G) of a group G is the intersection of the normalizers of all the subgroups of G. In this paper, the structure of finite groups with a cyclic norm quotient is determined. As an application of the result, an interesting characteristic of cyclic groups is given, which asserts that a finite group G is cyclic if and only if Aut(G)/P(G) is cyclic, where P(G) is the power automorphism group of G.

ON THE INDEX AND BIDERIVATIONS OF SIMPLE MALCEV ALGEBRAS

  • Yahya, Abdelaziz Ben;Boulmane, Said
    • 대한수학회논문집
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    • 제37권2호
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    • pp.385-397
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    • 2022
  • Let (M, [ , ]) be a finite dimensional Malcev algebra over an algebraically closed field 𝔽 of characteristic 0. We first prove that, (M, [ , ]) (with [M, M] ≠ 0) is simple if and only if ind(M) = 1 (i.e., M admits a unique (up to a scalar multiple) invariant scalar product). Further, we characterize the form of skew-symmetric biderivations on simple Malcev algebras. In particular, we prove that the simple seven dimensional non-Lie Malcev algebra has no nontrivial skew-symmetric biderivation.

Applying Stochastic Fractal Search Algorithm (SFSA) in Ranking the Determinants of Undergraduates Employability: Evidence from Vietnam

  • DINH, Hien Thi Thu;CHU, Ngoc Nguyen Mong;TRAN, Van Hong;NGUYEN, Du Van;NGUYEN, Quyen Le Hoang Thuy To
    • The Journal of Asian Finance, Economics and Business
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    • 제7권12호
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    • pp.583-591
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    • 2020
  • Employability has recently become the first target of the national higher education. Its model has been updated to catch the new trend of Industry 4.0. This paper aims at analyzing and ranking the determinants of undergraduate employability, focusing on business and economics majors in Ho Chi Minh City, Vietnam. In-depth interviews with content analysis have been primarily conducted to reach an agreement on a key group of factors: human capital, social capital, and identity. The Stochastic Fractal Search Algorithm (SFSA) is then applied to rank the sub-factors. Human capital is composed of three major elements: attitude, skill, and knowledge. Social capital is approached at both structural and cognitive aspects with three typical types: bonding, bridging, and linking. The analysis has confirmed the change of priority in employability determinants. Human capital is still a driver but the priority of attitude has been confirmed in the contemporary context. Then, social capital with the important order of linking, bridging, and bonding is emphasized. Skill, knowledge, and identity share the least weight in the model. It is noted that identity is newly proposed in the model but a certain role has been found. The findings are crucial for education strategies to enhance university graduate employability.

부등식의 영역 교육과정 분석: 고교-대학수학의 연계 및 수학적 연결성을 중심으로 (An analysis of the curriculum on inequalities as regions: Using curriculum articulation and mathematical connections)

  • 이송희;임웅
    • 한국수학교육학회지시리즈A:수학교육
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    • 제59권1호
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    • pp.1-15
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    • 2020
  • 본 연구에서는 2015개정교육과정에서 '경제수학'으로 이동한 '부등식의 영역(inequalities as regions)' 단원과 미적분학 사이의 연계성 및 수학적 연결성을 분석하여 '부등식의 영역'이 미적분학의 중요한 선수학습개념이라는 논지를 제시한다. 교육과정의 연계성 측면에서 직업 교과에 포함된 '경제수학'을 학습하지 않고 이공계에 진학하는 학생들은 '부등식의 영역'의 절차적 개념적 지식의 부재로 인하여 미적분학에서 학습 위계의 '격차'를 경험할 가능성이 크다. 수학적 연결성의 관점에서는 '부등식의 영역'과 밀접한 연관이 있는 미적분학의 다변수함수 이론의 학습에 어려움을 느낄 수 있다고 판단된다.

교수학적 변환 연구의 동향과 과제 (Trends and Tasks in Research on Didactic Transposition in Mathematics Education)

  • 이경화
    • 대한수학교육학회지:수학교육학연구
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    • 제26권2호
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    • pp.173-188
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    • 2016
  • 교수학적 변환 관련 국내 연구는 약 25년 동안, 국외 연구는 약 35년 동안 이루어졌다. 본 연구는 국내와 국외에서 이루어진 교수학적 변환 관련 연구의 동향을 살펴보고 과제를 제안하는 데에 목표를 두었다. 연구결과는 다음과 같다. 첫째, 국내 연구에서는 교수학적 변환 이론이 수학교과서와 수학수업을 심층적으로 이해하는 관점이자 방법이 된다는 것을 구체적인 사례를 통하여 입증하는 데에 치중해왔다. 그동안 파악한 사례를 메타적으로 분석하거나 새롭게 설계하여 적용한 사례를 기초로 교수학적 변환 이론의 발전에 기여하는 연구가 이루어질 필요가 있다. 둘째, 국내에서도 수학교육학 외부의 연구 중에는 극단적인 교수 현상을 추가로 확인하거나 메타적으로 교과의 내용을 분석하는 것까지 시도한 경우가 있었다. 이들 연구를 수학교육학 내부의 논의맥락에서 재해석하여 시사점을 도출할 필요가 있다. 셋째, 실재 또는 실재의 복합체로서 학교수학을 이해하고 기술하려는 연구가 이루어질 필요가 있다. 국외에서는 이와 관련하여 다양한 연구가 이루어졌으므로 이를 국내실정에 부합되는 형태로 수정하여 적용함으로써, 우리나라 고유의 실재 또는 실재의 복합체가 무엇인지를 파악하여 개선하는 연구가 이루어질 필요가 있다. 넷째, 국외 연구에서는 교수학적 변환 이론을 인류학, 기술문명 시대의 인간과 교육, 인간행동학, 인식론 등 다양한 학문분야의 주요 개념과 연결해왔다. 국내 연구에서도 연구대상을 확장하고 다양한 연결을 시도할 필요가 있다. 다섯째, 국내 연구에서 사용하는 교수학적 변환 관련 개념과 용어에 대한 이론적인 논의가 필요하다.

The Trickle-Down Effect of Intellectual Capital on Banks' Macro Performance in Indonesia

  • WAHAB, Abdul;ABBAS, Nurhasnah;SYARIATI, Alim;SYARIATI, Namla Elfa
    • The Journal of Asian Finance, Economics and Business
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    • 제7권12호
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    • pp.703-710
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    • 2020
  • The stock market serves as a representation of economic well-being in a country. Along with the myriad of economic predictors, specific knowledge possession may lead to different macro consequences of stock performance and market value. This study empirically investigates the capacity of possessing excellent intellectual capital to increase the performance and values of listed banks in Indonesia. The selection of banks as the primary data represents such sectors' capability to attract, employ, or exploit the excellent internal capacity under the discussion of resource-based view theory. At best to the authors' knowledge, this topic's findings are still elusive and debatable upon considering the direct and indirect relationships between the proposed exogenous and endogenous variables. Eighteen listed banks form the panel data throughout 2011-2016. This study employs a path analysis and Sobel test to obtain the results of the proposed hypothesis. The results report some positive relationships of the intellectual capital to firms' performances and values, directly and indirectly, with a substantial effect on the second model compared to the first model. This study highlighted knowledge's capacity as a vital basis to gauge the banks' performance and valuation. However, a better formulation of intellectual capital is required to capture a better measurement.

ON A CLASS OF CONSTACYCLIC CODES OF LENGTH 2ps OVER $\frac{\mathbb{F}_{p^m}[u]}{{\langle}u^a{\rangle}}$

  • Dinh, Hai Q.;Nguyen, Bac Trong;Sriboonchitta, Songsak
    • 대한수학회보
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    • 제55권4호
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    • pp.1189-1208
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    • 2018
  • The aim of this paper is to study the class of ${\Lambda}$-constacyclic codes of length $2p^s$ over the finite commutative chain ring ${\mathcal{R}}_a=\frac{{\mathbb{F}_{p^m}}[u]}{{\langle}u^a{\rangle}}={\mathbb{F}}_{p^m}+u{\mathbb{F}}_{p^m}+{\cdots}+u^{a-1}{\mathbb{F}}_{p^m}$, for all units ${\Lambda}$ of ${\mathcal{R}}_a$ that have the form ${\Lambda}={\Lambda}_0+u{\Lambda}_1+{\cdots}+u^{a-1}{\Lambda}_{a-1}$, where ${\Lambda}_0,{\Lambda}_1,{\cdots},{\Lambda}_{a-1}{\in}{\mathbb{F}}_{p^m}$, ${\Lambda}_0{\neq}0$, ${\Lambda}_1{\neq}0$. The algebraic structure of all ${\Lambda}$-constacyclic codes of length $2p^s$ over ${\mathcal{R}}_a$ and their duals are established. As an application, this structure is used to determine the Rosenbloom-Tsfasman (RT) distance and weight distributions of all such codes. Among such constacyclic codes, the unique MDS code with respect to the RT distance is obtained.