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Showing papers in "Communications of The Korean Mathematical Society in 2018"


Journal ArticleDOI
TL;DR: In this article, the authors consider surfaces in the 3-dimensional Euclidean space E3 which are of finite III-type and show that tubes are of infinite 3-type.
Abstract: In this paper, we consider surfaces in the 3-dimensional Euclidean space E3 which are of finite III-type, that is, they are of finite type, in the sense of B.-Y. Chen, corresponding to the third fundamental form. We present an important family of surfaces, namely, tubes in E3 .We show that tubes are of infinite III-type.

18 citations





Journal ArticleDOI
TL;DR: In this article, the q-multinomial-coefficient with powers in the umbrae was defined, which implies a vector version of the Q-binomial theorem, and an arbitrary complex power o
Abstract: In this paper we extend the two q-additions with powers in the umbrae, define a q-multinomial-coefficient, which implies a vector version of the q-binomial theorem, and an arbitrary complex power o ...

3 citations


Book ChapterDOI
TL;DR: In this paper, new sharpened Redheffer-type inequalities related to the Fox-Wright functions are established for hypergeometric functions and for the four-parametric Mittag-Leffler functions with best possible exponents.
Abstract: In this chapter, new sharpened Redheffer-type inequalities related to the Fox–Wright functions are established. As consequence, we show new Redheffer-type inequalities for hypergeometric functions and for the four-parametric Mittag-Leffler functions with best possible exponents.

3 citations


Journal ArticleDOI
TL;DR: In this paper, a family of ribbon 2-knots with trivial Alexander polynomial was considered and nonabelian SL(2, C)-representations from the groups of these knots were given.
Abstract: We consider a family of ribbon 2-knots with trivial Alexander polynomial. We give nonabelian SL(2, C)-representations from the groups of these knots, and then calculate the twisted Alexander polynomials associated to these representations, which allows us to classify this family of knots.

2 citations