• 대한수학회논문집
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• 제21권1호
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• pp.117-133
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• 2006

Cameron and Storvick discovered change of scale formulas for Wiener integrals of bounded functions in a Banach algebra S of analytic Feynman integrable functions on classical Wiener space. Yoo and Skoug extended these results to abstract Wiener space for a generalized Fresnel class $F_{A1,A2}$ containing the Fresnel class F(B) which corresponds to the Banach algebra S on classical Wiener space. In this paper, we present a change of scale formula for Wiener integrals of various functions on $B^2$ which need not be bounded or continuous.

• 대한수학회보
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• 제26권2호
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• pp.151-158
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• 1989

Let (H, B, .nu.) be an abstract Wiener space where H is a separable Hilbert space with the inner product <.,.> and the norm vertical bar . vertical bar=.root.<.,.>, which is densely and continuously imbedded into a separable Banach space B with the norm ∥.∥ , and .nu. is a probability measure on the Borel .sigma.-algebra B(B) of B which satisfies (Fig.) where $B^{*}$ is the topological dual of B and (.,.) is the natural dual pairing between B and $B^{*}$. We will regard $B^{*}$.contnd.H.contnd.B in the natural way. Thus we have =(y, x) for all y in $B^{*}$ and x in H. Let $R^{n}$ and C denote the n-dimensional Euclidean space and the complex numbers respectively.ctively.

• 대한수학회논문집
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• 제22권1호
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• pp.75-90
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• 2007

Huffman, Park and Skoug introduced various results for the $L_p$ analytic Fourier-Feynman transform and the convolution for functionals on classical Wiener space which belong to some Banach algebra S introduced by Cameron and Strovic. Also Chang, Kim and Yoo extended the above results to an abstract Wiener space for functionals in the Fresnel class F(B) which corresponds to S. Recently Kim, Song and Yoo investigated more generalized relationships between the Fourier-Feynman transform and the convolution product for functionals in a generalized Fresnel class $F_{A_1,A'_2}$ containing F(B). In this paper, we establish various interesting relationships and expressions involving the first variation and one or two of the concepts of the Fourier-Feynman transform and the convolution product for functionals in $F_{A_1,A_2}$.

• 충청수학회지
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• 제24권3호
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• pp.517-528
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• 2011

Cameron and Storvick introduced change of scale formulas for Wiener integrals of bounded functions in the Banach algebra $\mathcal{S}$ of analytic Feynman integrable functions on classical Wiener space. Yoo and Skoug extended this result to an abstract Wiener space. Also Yoo, Song, Kim and Chang established a change of scale formula for Wiener integrals of functions on abstract Wiener space which need not be bounded or continuous. In this paper, we investigate a change of scale formula for generalized Wiener integrals of various functions on classical Wiener space.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제30권4호
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• pp.469-497
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• 2016

본 연구에서는 추상대수학의 체, 벡터공간, 최소다항식 등의 개념을 중심으로 삼차방정식 해의 작도(불)가능성을 학습할 수 있는 학습 자료와 초등수학적 접근을 구현한 학습 자료를 각각 개발하였다. 그리고 개발된 자료들에 대해 타당성, 학습 가능성, 장점 및 단점을 실험적으로 확인하였다. 본 연구에서 개발된 자료들은 중등학교의 수학 우수학생들, 수학을 배우는 대학생들, 수학교사들에게 유익할 것으로 기대되며, 3대 작도불능문제의 해결, 다양한 3차방정식의 해의 작도(불)가능성을 학습하는데 활용될 수 있을 것으로 기대된다.

• 대한수학회논문집
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• 제33권4호
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• pp.1141-1158
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• 2018

Hahn difference operator $D_{q,{\omega}}$ which is defined by $$D_{q,{\omega}}g(t)=\{{\frac{g(gt+{\omega})-g(t)}{t(g-1)+{\omega}}},{\hfill{20}}\text{if }t{\neq}{\theta}:={\frac{\omega}{1-q}},\\g^{\prime}({\theta}),{\hfill{83}}\text{if }t={\theta}$$ received a lot of interest from many researchers due to its applications in constructing families of orthogonal polynomials and in some approximation problems. In this paper, we investigate sufficient conditions for stability of the abstract linear Hahn difference equations of the form $$D_{q,{\omega}}x(t)=A(t)x(t)+f(t),\;t{\in}I$$, and $$D^2{q,{\omega}}x(t)+A(t)D_{q,{\omega}}x(t)+R(t)x(t)=f(t),\;t{\in}I$$, where $A,R:I{\rightarrow}{\mathbb{X}}$, and $f:I{\rightarrow}{\mathbb{X}}$. Here ${\mathbb{X}}$ is a Banach algebra with a unit element e and I is an interval of ${\mathbb{R}}$ containing ${\theta}$.

• 한국수학사학회지
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• 제11권2호
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• pp.35-42
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• 1998

It is an undecidable problem to determine whether a given equation logically follows from a given set of equations. However, it is possible to give the answer to many instances of the problem, even though impossible to answer all the instances, by using rewrite systems and completion procedures. Rewrite systems and completion procedures can be implemented as computer programs. The new equations such a computer program generates are theorems that hold in the given equational theory. For example, a completion procedure applied on the group axioms generates simple theorems about groups. Mathematics students' teaming to know the existence and mechanisms of computer programs that prove simple theorems can be a significant help to promote the interests in abstract algebra and logic, and the motivation for studying.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제10권3호
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• pp.177-183
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• 2003

In this paper, we initiate the study of some annihilator conditions on polynomials which were used by Kaplansky [Rings of operators. W. A. Benjamin, Inc., New York, 1968] to abstract the algebra of bounded linear operators on a Hilbert spaces with Baer condition. On the other hand, p.p.-rings were introduced by Hattori [A foundation of torsion theory for modules over general rings. Nagoya Math. J. 17 (1960) 147-158] to study the torsion theory. The purpose of this paper is to introduce the near-rings with Baer condition and near-rings with p.p. condition which are somewhat different from ring case, and to extend a results of Armendariz [A note on extensions of Baer and P.P.-rings. J. Austral. Math. Soc. 18 (1974), 470-473] and Jøndrup [p.p. rings and finitely generated flat ideals. Proc. Amer. Math. Soc. 28 (1971) 431-435].

• Journal of Applied and Pure Mathematics
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• 제5권1_2호
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• pp.1-8
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• 2023

This study is on a Boolean B or Boolean lattice L in abstract algebra with closed binary operation *, complement and distributive properties. Both Binary operations and logic properties dominate this set. A lattice sheds light on binary operations and other algebraic structures. In particular, the construction of the elements of this L set from idempotent elements, our definition of k-order idempotent has led to the expanded definition of the definition of the lattice theory. In addition, a lattice offers clever solutions to vital problems in life with the concept of logic. The restriction on a lattice is clearly also limit such applications. The flexibility of logical theories adds even more vitality to practices. This is the main theme of the study. Therefore, the properties of the set elements resulting from the binary operation force the logic theory. According to the new definition given, some properties, lemmas and theorems of the lattice theory are examined. Examples of different situations are given.

• 한국수학사학회지
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• 제21권4호
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• pp.19-48
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• 2008

본고에서는 현대 추상대수학의 기반을 닦은 독일 여성수학자 에미 뇌터의 수학적 삶의 역사를 살펴보고 수학자, 수학교사 등 수학전문가를 양성하는 대학 수학교육에 주는 시사점을 찾아보고자 하였다. 최근 Hyde et al.([14])은 수학 표준화 시험에서 미국의 2-11학년 학생들이 젠더 간 격차를 거의 보이고 있지 않음에도 불구하고, 대학이나 연구소 등 수학 관련 분야에서 전문가로 종사하는 여성수학자나 여성과학자의 비율이 남성에 비해 크게 뒤지고 있음을 지적하였다. 또한 Guise et al.([13])도 국제 수학성취도 비교를 위한 2003-PISA 연구결과를 토대로 하여 젠더 평등지수가 떨어지는 국가일수록 젠더 간 수학성취도 차이가 크다는 관계를 규명하였다. 에미 괴터는 여학생이 대학교육을 받는 것조차 어려웠던 시대에 젠더와 인종 등 사회적 편견과 차별, 그로 인한 경제적인 역경을 극복하면서 현대 추상대수학이라는 새로운 분야를 창조해 낸 20세기 가장 위대한 수학자라 불리는 독일의 여성수학자이다. 에미 뇌터는 수학자로 살면서 경험한 모든 편견과 차별은 비본질적인 것이며 수학만이 자신의 삶 속에서 추구해야 할 본질적인 것이라 판단하였고, 이를 실제 삶 속에서 실천하였고 궁극적으로는 기존 수학의 차원을 통합하거나 넘어서는 새로운 수학을 창조해냈다. 전 생애 동안 편견과 차별을 경험하면서 단 하나의 본질 즉, '수학' 탐구에만 몰입한 에미 뇌터의 삶은 오늘날 수학, 과학 분야의 연구자와 이 분야의 전공과 직업을 택하려는 대학생들 모두에게 실천적 리더십 사례로 평가된다. 특히 이공계 분야 여학생들에게는 혹독한 편견과 차별에 대해 에미 뇌터가 실천적으로 보여준 초연함, 끈기와 인내심, 그리고 수학(학문)에 대한 순수한 열정을 통해 최고 수준의 수학, 과학 탐구와 창조에서 젠더격차가 존재하지 않는다는 것을 이해하는 계기가 되기를 기대한다.