• 제목/요약/키워드: $G_1$ operator

검색결과 168건 처리시간 0.023초

MULTIPLICITY AND NONLINEARITY IN THE NONLINEAR ELLIPTIC SYSTEM

  • Jung, Tack-Sun;Choi, Q-Heung
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제12권3호
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    • pp.161-169
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    • 2008
  • We investigate the existence of solutions u(x, t) for perturbations of the elliptic system with Dirichlet boundary condition $$\array {L{\xi}+{\mu}g({\xi}+2{\eta})=f\;in\;{\Omega}}\\{L{\eta}+{\nu}g({\xi}+2{\eta})=f\;in\;{\Omega}}$$ (0.1) where $g(u)=Bu^+-Au^-$, $u^+=max\{u,\;0\}$, $u^-=max\{-u,\;0\}$, ${\mu}$, ${\nu}$ are nonzero constants and the nonlinearity $({\mu}+2{\nu})g(u)$ crosses the eigenvalues of the elliptic operator L.

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ALGEBRAIC CHARACTERIZATION OF GENERIC STRONGLY SEMI-REGULAR RATIONAL PH PLANE CURVES

  • KIM GWANG-IL
    • Journal of applied mathematics & informatics
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    • 제19권1_2호
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    • pp.241-251
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    • 2005
  • In this paper, we introduce a new algebraic method to characterize rational PH plane curves. And using this method, we study the algebraic characterization of generic strongly regular rational plane PH curves expressed in the complex formalism which is introduced by R.T. Farouki. We prove that generic strongly semi-regular rational PH plane curves are completely characterized by solving a simple functional equation H(f, g) = $h^2$ where h is a complex polynomial and H is a bi-linear operator defined by H(f, g) = f'g - fg' for complex polynomials f,g.

INVESTIGATION OF BOUNDS FOR 𝕽 GRAPH VIA TOPOLOGICAL INDICES

  • GIRISHA. A;VENUGOPAL. G;KAVITA PERMI
    • Journal of applied mathematics & informatics
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    • 제42권4호
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    • pp.777-783
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    • 2024
  • Topoloical index is a numerical quantity which is correlates to properties of chemical compound . In this paper, we define operator graph namely, Edge ss-corona graph and we study structured properties of that graph. Also, establish the upper and lower bounds for First Zagreb index, Second Zagreb index, First Gourava index, SK1 index, Forgotten topological index and EM1 index of edge SS-corona graph.

시스템 복잡도를 개선한 $GF(2^m)$ 상의 병렬 $AB^2+C$ 연산기 설계 (Low System Complexity Bit-Parallel Architecture for Computing $AB^2+C$ in a Class of Finite Fields $GF(2^m)$)

  • 변기령;김흥수
    • 전자공학회논문지SC
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    • 제40권6호
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    • pp.24-30
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    • 2003
  • 본 논문에서는 m차 기약 AOP를 적용하여 시스템 복잡도를 개선한 GF(2/sup m/)상의 새로운 AB²+C 연산기법과 그 하드웨어 구현회로를 제안하였다. 제안된 회로는 병렬 입출력 구조를 가지며, CS, PP 및 MS를 모듈로 하여 구성되며 이들은 각각 AND와 XOR 게이트의 규칙적인 배열구조를 갖는다. 제안된 회로의 시스템 복잡도는 (m+1)²개의 2-입력 AND게이트와 (m+1)(m+2)개의 2-입력 XOR게이트의 회로복잡도와 연산에 소요되는 최대 지연시간은 T/sub A/sup +/(1+「log₂/sup m/」)T/sub x/ 이다. 제안된 연산기의 시스템 복잡도와 구성상의 특징을 타 연산기를 표로 비교하였고, 그 결과 상대적으로 우수함을 보였다. 또한, 단순하면서도 정규화된 소자 및 결선의 구조는 VLSI 구현에 적합하다.

On the spectral rigidity of almost isospectral manifolds

  • Pak, Hong-Kyung
    • 대한수학회보
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    • 제29권2호
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    • pp.237-243
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    • 1992
  • Let (M, g, J) be a closed Kahler manifold of complex dimension m > 1. We denote by Spec(M,g) the spectrum of the real Laplace-Beltrami operator. DELTA. acting on functions on M. The following characterization problem on the spectral rigidity of the complex projective space (CP$^{m}$ , g$_{0}$ , J$_{0}$ ) with the standard complex structure J$_{0}$ and the Fubini-Study metric g$_{0}$ has been attacked by many mathematicians : if (M,g,J) and (CP$^{m}$ ,g$_{0}$ ,J$_{0}$ ) are isospectral then is it true that (M,g,J) is holomorphically isometric to (CP$^{m}$ ,g$_{0}$ ,J$_{0}$ )\ulcorner In [BGM], [LB], it is proved that if (M,J) is (CP$^{m}$ , J$_{0}$ ) then the answer to the problem is affirmative. Tanno ([Ta]) has proved that the answer is affirmative if m .leq. 6. Recently, Wu([Wu]) has showed in a more general sense that if (M, g) and (CP$^{m}$ ,g$_{0}$ ) are (-4/m)-isospectral, m .geq. 4, and if the second betti number b$_{2}$(M) is equal to b$_{2}$(CP$^{m}$ ).

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NEGATIVE SOLUTION FOR THE SYSTEM OF THE NONLINEAR WAVE EQUATIONS WITH CRITICAL GROWTH

  • Jung, Tacksun;Choi, Q.-Heung
    • Korean Journal of Mathematics
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    • 제16권1호
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    • pp.41-49
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    • 2008
  • We show the existence of a negative solution for the system of the following nonlinear wave equations with critical growth, under Dirichlet boundary condition and periodic condition $$u_{tt}-u_{xx}=au+b{\upsilon}+\frac{2{\alpha}}{{\alpha}+{\beta}}u_+^{\alpha-1}{\upsilon}_+^{\beta}+s{\phi}_{00}+f,\\{\upsilon}_{tt}-{\upsilon}_{xx}=cu+d{\upsilon}+\frac{2{\alpha}}{{\alpha}+{\beta}}u_+^{\alpha}{\upsilon}_+^{{\beta}-1}+t{\phi}_{00}+g,$$ where ${\alpha},{\beta}>1$ are real constants, $u_+={\max}\{u,0\},\;s,\;t{\in}R,\;{\phi}_{00}$ is the eigenfunction corresponding to the positive eigenvalue ${\lambda}_{00}$ of the wave operator and f, g are ${\pi}$-periodic, even in x and t and bounded functions.

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SEMI-INVARIANT SUBMANIFOLDS OF CODIMENSION 3 IN A COMPLEX HYPERBOLIC SPACE

  • KI, U-HANG;LEE, SEONG-BAEK;LEE, AN-AYE
    • 호남수학학술지
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    • 제23권1호
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    • pp.91-111
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    • 2001
  • In this paper we prove the following : Let M be a semi-invariant submanifold with almost contact metric structure (${\phi}$, ${\xi}$, g) of codimension 3 in a complex hyperbolic space $H_{n+1}{\mathbb{C}}$. Suppose that the third fundamental form n satisfies $dn=2{\theta}{\omega}$ for a certain scalar ${\theta}({\leq}{\frac{c}{2}})$, where ${\omega}(X,\;Y)=g(X,\;{\phi}Y)$ for any vectors X and Y on M. Then M has constant eigenvalues correponding the shape operator A in the direction of the distinguished normal and the structure vector ${\xi}$ is an eigenvector of A if and only if M is locally congruent to one of the type $A_0$, $A_1$, $A_2$ or B in $H_n{\mathbb{C}}$.

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EXISTENCE OF WEAK SOLUTIONS TO A CLASS OF SCHRÖDINGER TYPE EQUATIONS INVOLVING THE FRACTIONAL p-LAPLACIAN IN ℝN

  • Kim, Jae-Myoung;Kim, Yun-Ho;Lee, Jongrak
    • 대한수학회지
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    • 제56권6호
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    • pp.1529-1560
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    • 2019
  • We are concerned with the following elliptic equations: $$(-{\Delta})^s_pu+V (x){\mid}u{\mid}^{p-2}u={\lambda}g(x,u){\text{ in }}{\mathbb{R}}^N$$, where $(-{\Delta})_p^s$ is the fractional p-Laplacian operator with 0 < s < 1 < p < $+{\infty}$, sp < N, the potential function $V:{\mathbb{R}}^N{\rightarrow}(0,{\infty})$ is a continuous potential function, and $g:{\mathbb{R}}^N{\times}{\mathbb{R}}{\rightarrow}{\mathbb{R}}$ satisfies a $Carath{\acute{e}}odory$ condition. We show the existence of at least one weak solution for the problem above without the Ambrosetti and Rabinowitz condition. Moreover, we give a positive interval of the parameter ${\lambda}$ for which the problem admits at least one nontrivial weak solution when the nonlinearity g has the subcritical growth condition.

모바일 네트워크에서 인터넷 응용을 위한 향상된 ID관리 프로토콜 (I2DM : An Improved Identity Management Protocol for Internet Applications in Mobile Networks)

  • 박인신;정종필
    • 정보처리학회논문지C
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    • 제19C권1호
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    • pp.29-38
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    • 2012
  • 최근 급속도로 보급되고 있는 스마트폰과 SNS(Social Network Service)로 인한 인터넷 응용프로그램 활용의 증가는 3G 네트워크 이상의 네트워크 대역폭을 빠르게 잠식해가고 있으며 이로 인한 속도 저하와 서비스 질 저하로 인한 기간통신사들의 시설투자비 증가 요구가 강하게 대두되고 있다. 아울러 모바일 네트워크 사용자의 폭증에 따르는 모바일 서비스 제공자와 모바일 네트워크상의 ID관리문제를 촉발하고 있다. 본 논문은 3G 네트워크에서 모바일 인터넷 응용 서비스상의 사용자 ID관리와 보안문제를 해결하기 위한 프로토콜로 제안된 IDM3G[1]를 기반으로 보다 향상된 인증관리 프로토콜을 제안한다. 제안하는 $I^2DM$ 프로토콜은 기존의 IDM3G 프로토콜이 MO를 통한 상호 인증을 수행하면서 발생시키는 부하를 모바일 인터넷 응용 서비스 제공자에게 일정 부분의 역할을 분산시킴으로써 모바일 및 서비스 제공자의 ID관리와 함께 네트워크 부하와 정보처리를 위한 프로세스 부하 그리고 송수신되는 패킷의 수를 보다 효율화한다. 향후 더욱 그 수요가 폭증할 것으로 예상되는 3G 이후의 모바일 네트워크에 대한 수요를 대비하여 보다 최적화된 프로토콜을 제안한다.

SEMI-INVARIANT SUBMANIFOLDS OF CODIMENSION 3 SATISFYING 𝔏ξ∇ = 0 IN A NONFLAT COMPLEX SPACE FORM

  • AHN, SEONG-SOO;LEE, SEONG-BAEK;LEE, AN-AYE
    • 호남수학학술지
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    • 제23권1호
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    • pp.133-143
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    • 2001
  • In this paper, we characterize some semi-invariant submanifolds of codimension 3 with almost contact metric structure (${\phi}$, ${\xi}$, g) satisfying 𝔏ξ∇ = 0 in a nonflat complex space form, where ${\nabla}$ denotes the Riemannian connection induced on the submanifold, and 𝔏ξ is the operator of the Lie derivative with respect to the structure vector field ${\xi}$.

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