• 대한수학회보
• /
• 제32권2호
• /
• pp.349-357
• /
• 1995

In the theory of elliptic curves over a complete field with bad reduction (i.e. with nonintegral j-invariant) Tate elliptic curves play an important role. Likewise, in the theory of Drinfeld modules, Tate-Drinfeld modules replace Tate elliptic curves.

• 대한수학회지
• /
• 제41권4호
• /
• pp.773-773
• /
• 2004

In our paper "Paranormal contractions and invariant subspaces" published in Journal of the Korean Mathematical Society, Volume 40 (2003), Number 6, pp.933-942, the statement to observation (1) on page 935 should read:(omitted)

• 대한수학회지
• /
• 제45권3호
• /
• pp.695-698
• /
• 2008

A simple proof of the fact that the j-invariants for Weierstrass equations are invariant under birational transformations which keep the forms of Weierstrass equations is given by finding a non-trivial explicit birational transformation which sends a normalized Weierstrass equation to the same equation.

• 통합자연과학논문집
• /
• 제10권4호
• /
• pp.240-244
• /
• 2017

We study the behavior of some invariants under completion. We also give a counterexample, which is the same as a counterexample to Ding's Conjecture, to Koh-Lee's Conjecture.

• Kyungpook Mathematical Journal
• /
• 제50권1호
• /
• pp.49-58
• /
• 2010

We show that the Links-Gould polynomial of a link has finite type coefficients in a multivariate series expansion, and express the leading coefficients in terms of the linking numbers of a link.

• Korean Journal of Mathematics
• /
• 제13권2호
• /
• pp.193-202
• /
• 2005

We define a general space $H_{{\omega},p}$ of the Hardy space and improve that Aleman's results to the space $H_{{\omega},p}$. It follows that the multiplication operator on this space is cellular indecomposable and that each invariant subspace contains nontrivial bounded functions.

• Korean Journal of Mathematics
• /
• 제5권2호
• /
• pp.169-176
• /
• 1997

The purpose of this note is to compare two known results related to the lifting problem of an action of a topological group G on a G-space X to a coverring space of X.

• 대한수학회보
• /
• 제38권1호
• /
• pp.157-161
• /
• 2001

In this paper, we prove that an affine manifold M is finitely covered by a manifold $\overline{M}$ where $\overline{M}$ is radiant or the tangent bundle of $\overline{M}$ has a conformally flat vector subbundle of the projective holonomy group of M admits an invariant probability Borel measure. This implies that$x^M$is zero.

• 대한수학회논문집
• /
• 제10권2호
• /
• pp.385-392
• /
• 1995

Along with certain properties of a chronal or a causal isomorphism, we discuss the invariant nature of a causality conditions of a given space-time.

• 대한수학회지
• /
• 제36권3호
• /
• pp.621-631
• /
• 1999

In this paper we briefly describe the geometry of the Cayley hyperbolic plane and we show that every uniform lattice in quaternionic space cannot be deformed in the Cayley hyperbolic 2-plane. We also describe the nongeometric bending deformation by developing the theory of the Cartan angular invariant for quaternionic hyperbolic space.