• 대한수학회지
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• 제10권2호
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• pp.73-75
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• 1973

• 대한수학회논문집
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• 제8권4호
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• pp.767-777
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• 1993

• Korean Journal of Mathematics
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• 제29권2호
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• pp.293-304
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• 2021

In this paper, we present a Schwarz lemma at the boundary for analytic functions at the unit disc, which generalizes classical Schwarz lemma for bounded analytic functions. For new inequalities, the results of Rogosinski's lemma, Subordination principle and Jack's lemma were used.

• 한국수학사학회지
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• 제19권4호
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• pp.31-62
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• 2006

본 논문에서는 먼저 수학사를 수업에 활용하고자 하는 이론적 근거를 여러 가지 교육적 측면에서 고찰한다. 아울러 수학적 인식에 관한 개인적인 발달과 역사적 발달 사이의 관계를 토대로 수학사 활용의 교육적 유용성을 가장 강력하게 이론적으로 뒷받침하는 역사 발생 원리의 생성, 전개 과정 및 그 의의와 한계 등을 논한다. 또한 여러 가지 측면에서 이론적 근거가 마련되고 있는 수학사 활용에 대한 긍정적인 입장에서 구체적인 방안을 기준과 함께 제시하였다. 다음으로 지금까지 논의된 수학 영재 프로그램 개발의 방향과 실제를 개관하고 수학사를 접목하는 것에 대한 근거를 밝혔다. 마지막으로 수학사 활용의 예를 미분개념의 이해를 중심으로 제시하였다.

• 호남수학학술지
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• 제13권1호
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• pp.53-63
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• 1991

In this paper we first present the elements of the theory of families of distributions and corresponding estimators having structual properties which are preserved under certain groups of transformations, called "Invariance Principle". The invariance principle is an intuitively appealing decision principle which is frequently used, even in classical statistics. It is interesting not only in its own right, but also because of its strong relationship with several other proposal approaches to statistics, including the fiducial inference of Fisher [3, 4], the structural inference of Fraser [5], and the use of noninformative priors of Jeffreys [6]. Unfortunately, a space precludes the discussion of fiducial inference and structural inference. Many of the key ideas in these approaches will, however, be brought out in the discussion of invarience and its relationship to the use of noninformatives priors. This principle is also applied to the problem of finding the best scale invariant estimator in the scale parameter problem. Finally, several examples are subsequently given.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제22권4호
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• pp.545-556
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• 2008

삼각형은 가장 단순한 기하학적 도형이지만, 기하학 탐구에서 삼각형은 훌륭한 연구 대상이며 후속적인 기하학 연구의 중요한 도구라고 할 수 있다. 본 연구에서는 지렛대 원리를 이용하여 삼각형의 Gergonne 점과 Gergonne 점의 딸림점들의 존재성, Gergonne 점에 관련된 등식을 증명하였고, Gergonne 점의 딸림점들에 대한 새로운 등식을 증명하였다.

• 한국수학교육학회지시리즈A:수학교육
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• 제42권3호
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• pp.387-402
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• 2003

Realistic Mathematics Education (RME) focuses on guided reinvention through which students explore experientially realistic context problems to develop informal problem solving strategies and solutions. This research applied this philosophy of RME to design a differential equation course at a university level. In particular, the course encouraged the students of the course to use numerical methods to solve differential equations. In this context, the purpose of this research was to describe the developmental process in which the students constructed and reinvented Euler algorithm in the class. For the purpose, this paper will present the didactical principle of RME and describe the process of developmental research to investigate the inferential process of students in solving the first order differential equation numerically. Finally, the qualitative analysis of the students' reasoning and use of symbols reveals how the students reinvent Euler algorithm under the didactical principle of guided reinvention. In this research, it has been found that the students developed deep understanding of Euler algorithm in the class. Moreover, it has been shown that the experience of doing mathematics in the course had a positive impact on students' mathematical belief and attitude. These findings imply that the didactical principle of RME can be applied to design university mathematical courses and in general, provide a perspective on how to reform mathematics curriculum at a university level.

• 충청수학회지
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• 제26권2호
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• pp.297-308
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• 2013

We define one-sided quadrangular fuzzy sets, a left quadrangular fuzzy set and a right quadrangular fuzzy set. And then we generalize the results of addition, subtraction, multiplication, and division based on the Zadeh's extension principle for two one-sided quadrangular fuzzy sets. In addtion, we find the condition that the result of addition or subtraction for two one-sided quadrangular fuzzy sets becomes a triangular fuzzy number.

• 대한수학회지
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• 제38권6호
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• pp.1245-1260
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• 2001

A demi-closed theorem and some new weak convergence theorems of iterative sequences for asymptotically nonexpansive and nonexpansive mappings in Banach spaces are obtained. The results presented in this paper improve and extend the corresponding results of [1],[8]-[10],[12],[13],[15],[16], and [18].

• 충청수학회지
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• 제27권2호
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• pp.277-286
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• 2014

We define the pentagonal fuzzy sets and generalize the results of addition, subtraction, multiplication, and division based on the Zadeh's extension principle for two pentagonal fuzzy sets. In addtion, we find the condition that the result of addition or subtraction for two pentagonal fuzzy sets becomes a triangular fuzzy number and give some example.