• Journal of applied mathematics & informatics
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• 제33권5_6호
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• pp.531-543
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• 2015

We determine interval of two eigenvalues for which there existence and nonexistence of positive solution for a system of even-order dynamic equation on time scales subject to Sturm-Liouville boundary conditions.

• 한국기록관리학회지
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• 제18권4호
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• pp.25-43
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• 2018

본 연구는 기록부존재 현상이 정보부존재로 이어지는 점에 주목했다. 기록의 분실${\cdot}$훼손${\cdot}$방치${\cdot}$무단파기${\cdot}$오분류${\cdot}$보존기간 하향 책정 등으로 인한 기록부존재 현상을 해결하기 위해선 기록 생산단계에서부터 철저한 기록관리가 이루어져야 함을 주장하였다. 이를 통해 정보부존재가 발생하지 않을 수 있고, 정보부존재가 발생하더라도 왜 정보부존재인지에 대한 설명도구로서 쓰일 수 있을 것이라 기대한다.

• Kyungpook Mathematical Journal
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• 제59권4호
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• pp.631-649
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• 2019

In this paper, we prove the global nonexistence of solutions for a quasilinear wave equation with time delay and acoustic boundary conditions. Further, we establish the blow up result under suitable conditions.

• 대한수학회지
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• 제59권1호
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• pp.205-216
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• 2022

This paper deals with a nonlinear wave equation with boundary damping and source terms of variable exponent nonlinearities. This work is devoted to prove a global nonexistence of solutions for a nonlinear wave equation with nonnegative initial energy as well as negative initial energy.

• 대한수학회논문집
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• 제38권3호
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• pp.741-754
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• 2023

In this paper, we study the existence and nonexistence of solutions for a class of Hamiltonian strongly degenerate elliptic system with subcritical growth $$\left{\array{-{\Delta}_{\lambda}u-{\mu}v={\mid}v{\mid}^{p-1}v&&\text{in }{\Omega},\\-{\Delta}_{\lambda}v-{\mu}u={\mid}u{\mid}^{q-1}u&&\text{in }{\Omega},\\u=v=0&&\text{ on }{\partial}{\Omega},}$$ where p, q > 1 and Ω is a smooth bounded domain in ℝ^N, N ≥ 3. Here Δ_λ is the strongly degenerate elliptic operator. The existence of at least a nontrivial solution is obtained by variational methods while the nonexistence of positive solutions are proven by a contradiction argument.

• 대한수학회지
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• 제34권3호
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• pp.623-632
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• 1997

In this paper, the nonexistence of the global solutions of semilinear wave equations with damping terms in the boundary conditions is investigated.

• 호남수학학술지
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• 제33권1호
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• pp.121-127
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• 2011

In this paper, when N is a compact Riemannian manifold, we discuss the nonexistence of conformal deformations on space-times $M = (a,\infty){\times}_fN$ with prescribed scalar curvature functions.

• 호남수학학술지
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• 제32권1호
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• pp.85-89
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• 2010

In this paper, when N is a compact Riemannian manifold, we discuss the nonexistence of conformal deformations on space-times M = $({\alpha},{\infty}){\times}_fN$ with prescribed scalar curvature functions.

• 호남수학학술지
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• 제30권4호
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• pp.693-701
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• 2008

In this paper, when N is a compact Riemannian manifold of class (A), we consider the nonexistence of some warping functions on space-times M = $[a,{\infty}){\times}_fN$ with prescribed scalar curvatures.

• East Asian mathematical journal
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• 제14권1호
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• pp.205-217
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• 1998

We obtain some theorems on nonexistence of certain finite type closed curves on the pseudo-hyperbolic space $H^4(-c^2)$ in the Minkowski spacetime $E^5_1$.