• Title/Summary/Keyword: U/F

Search Result 1,920, Processing Time 0.026 seconds

EIGENVALUE PROBLEMS FOR p-LAPLACIAN DYNAMIC EQUATIONS ON TIME SCALES

  • Guo, Mingzhou;Sun, Hong-Rui
    • Bulletin of the Korean Mathematical Society
    • /
    • v.46 no.5
    • /
    • pp.999-1011
    • /
    • 2009
  • In this paper, we are concerned with the following eigenvalue problems of m-point boundary value problem for p-Laplacian dynamic equation on time scales $(\varphi_p(u^{\Delta}(t)))^\nabla+{\lambda}h(t)f(u(t))=0,\;t\in(0,T)$, $u(0)=0,\varphi_p(u^{\Delta}(T))=\sum\limits_{i=1}^{m-2}a_i\varphi_p(u^{\Delta}(\xi_i))$, where $\varphi_p(u)=|u|^{p-2}$u, p > 1 and $\lambda$ > 0 is a real parameter. Under certain assumptions, some new results on existence of one or two positive solution and nonexistence are obtained for $\lambda$ evaluated in different intervals. Our work develop and improve many known results in the literature even for the continual case. In doing so the usual restriction that $f_0=lim_{u{\rightarrow}0}+f(u)/\varphi_p(u)$ and $f_\infty = lim_{u{\rightarrow}{\infty}}f(u)/\varphi_p({u})$ exist is removed. As an applications, an example is given to illustrate the main results obtained.

Die Herausbildung der grammatischen Kategorie vom deutschen Passiv und ihre historische Entwicklung (독일어 수동형 형태의 생성과정과 그 통시적 변화과정)

  • Kim Jai-Myoung
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
    • /
    • v.6
    • /
    • pp.123-154
    • /
    • 2002
  • Im Mittelpunkt der vorliegenden Arbeit steht die Untersuchung der Dynamik im System des deutschen Passivs mit dem $R\"{u}ckblick$ auf das Genuanische. Dabei steht es vorrangig im Zusammenhang mit der Grammatikalisierung der $Verbalf\"{u}gungen$ 'werden + PP' und 'sein + PP'. Und im heutigen deutschen Passivsystem ist zwar die $F\"{u}gung$ 'werden + PP' unmarkiert, aber im Genuanischen $\"{u}berwiegt\;die\;F\"{u}gung$ 'sein + PP'. Das Partizip der Kombination 'werden/sein + PP' wird im Gotischen $ausschlie{\ss}lich$ und im Althochdeutschen noch stellenweise flektiert. Hieraus darf geschlossen werden, dass im $Fr\"{u}hdeutschen$ das Verb finita und das Partizip als relativ $unabh\"{a}ngige$ Glieder einander $gegen\"{u}ber$ stehen und in einer Konstruktion verkettet werden, die einfach den Status der neuhochdeutschen periphrastischen Konstruktion aufweist. Die aspektuelle Bedeutung der $Passivf\"{u}gungen\;l\"{a}sst$ sich da als $bin\"{a}re$ Opposition von kategoriellen Merkmalen 'mutativ' (= Zustandswechel) und 'statal' (= Zustand), verteilt auf die F\"{u}gungen$ 'werden + PP' und 'sein + pp', beschreiben. Diese Merkmale kommt jeweils aus dem inchoativen bzw. durativen Verbalaspekt der Verba 'werden' bzw. 'sein' heraus. Diese Opposition unterscheidet sich von der neuhochdeutschen $Gegen\"{u}berstellung$ vom Vorgangspassiv und Zustandspassiv. Die Eigenbedeutung der Verben 'werden' und 'sein' $l\"{o}st$ sich nun, insbesondere im $Sp\"{a}talthochdeutschen$ in der Semantik der ganzen $F\"{u}gungen$ weitgehend auf, was seinerseits den Verlust der aspektualen Markiertheit der Passiv-Periphrasen mit den Verben finiten verursacht und ihre Entwicklung in Richtung auf die Paradigmatisierung der beiden $F\"{u}gungen\;erm\"{o}glicht$. Die weiter Entwicklung von $Passivf\"{u}gungen$ zeichnet sich durch eine zunehmende Expansion der $F\"{u}gung$ 'werden+PP' in die ursprungliche aspektuale $Sph\"{a}re$ der sein-Konstruktion aus. Dieser Prozess, der zur Auxilialisierung des Verbums finitum $f\"{u}hrt$, setzt schon im $Sp\"{a}talthochdeutschen$ ein und gelangt im Mittelhochdeutschen zur vollen $Auspr\"{a}gung$. Die Konkurrenz der beiden Passivkonstruktionen $f\"{u}hrt$ nun zur $allm\"{a}hlichen$ Verengung des aspektualen Bereichs der $F\"{u}gung$ '.sein+PP', $f\"{u}r$ die nun nur das Resultivum $\"{u}brig$ bleibt.

  • PDF

An Estimation of Constraint Factor on the ${\delta}_t$ Relationship (J-적분과 균열선단개구변위에 관한 구속계수 m의 평가)

  • 장석기
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.24 no.6
    • /
    • pp.24-33
    • /
    • 2000
  • This paper investigates the relationship between J-integral and crack tip opening displacement, ${\delta}_t$ using Gordens results of numerical analysis. Estimation were carried out for several strength levels such as ultimate, flow, yield, ultimate-flow, flow-yield stress to determine the influence of strain hardening and the ratio of crack length to width on the $J-{\delta}_t$ relationship. It was found that for SE(B) specimens, the $J-{\delta}_t$ relationship can be applied to relate J to ${\delta}_t$ as follows $J=m_j{\times}{\sigma}_i{\times}{\delta}_t$ where $m_j=1.27773+0.8307({\alpha}/W)$, ${\sigma}_i:{\sigma}_U$, ${\sigma}_{U-F}={\frac{1}{2}} ({\sigma}_U+{\sigma}_F$), ${\sigma}_F$, ${\sigma}_F}$ $Y=({\sigma}_F+{\sigma}_Y)$, ${\sigma}_Y$

  • PDF

NONLINEAR HEAT EQUATIONS WITH TRANSCENDENTAL NONLINEARITY IN BESOV SPACES

  • Pak, Hee Chul;Chang, Sang-Hoon
    • Journal of the Chungcheong Mathematical Society
    • /
    • v.23 no.4
    • /
    • pp.773-784
    • /
    • 2010
  • The existence of solutions in Besov spaces for nonlinear heat equations having transcendental nonlinearity: $$\frac{\partial}{{\partial}t}u-{\Delta}u=F(u)$$ is investigated. In particular, it is proved the local existence and blow-up phenomena of the solutions in Besov spaces for nonlinear heat equations corresponding to two transcendental nonlinear functions $F(u){\equiv}{\mid}u{\mid}e^{u^2}$ and $F(u){\equiv}e^u$ of rapid growth.

SOME RESULTS OF f-BIHARMONIC MAPS INTO A RIEMANNIAN MANIFOLD OF NON-POSITIVE SECTIONAL CURVATURE

  • He, Guoqing;Li, Jing;Zhao, Peibiao
    • Bulletin of the Korean Mathematical Society
    • /
    • v.54 no.6
    • /
    • pp.2091-2106
    • /
    • 2017
  • The authors investigate f-biharmonic maps u : (M, g) ${\rightarrow}$ (N, h) from a Riemannian manifold into a Riemannian manifold with non-positive sectional curvature, and derive that if $\int_{M}f^p{\mid}{\tau}(u){\mid}^pdv_g$ < ${\infty}$, $\int_{M}{\mid}{\tau}(u){\mid}^2dv_g$ < ${\infty}$ and $\int_{M}{\mid}du{\mid}^2dv_g$ < ${\infty}$, then u is harmonic. When u is an isometric immersion, the authors also get that if u satisfies some integral conditions, then it is minimal. These results give an affirmative partial answer to conjecture 4 (generalized Chen's conjecture for f-biharmonic submanifolds).

DISTANCE TWO LABELING ON THE SQUARE OF A CYCLE

  • ZHANG, XIAOLING
    • Korean Journal of Mathematics
    • /
    • v.23 no.4
    • /
    • pp.607-618
    • /
    • 2015
  • An L(2; 1)-labeling of a graph G is a function f from the vertex set V (G) to the set of all non-negative integers such that ${\mid}f(u)-f(v){\mid}{\geq}2$ if d(u, v) = 1 and ${\mid}f(u)-f(v){\mid}{\geq}1$ if d(u, v) = 2. The ${\lambda}$-number of G, denoted ${\lambda}(G)$, is the smallest number k such that G admits an L(2, 1)-labeling with $k=\max\{f(u){\mid}u{\in}V(G)\}$. In this paper, we consider the square of a cycle and provide exact value for its ${\lambda}$-number. In addition, we also completely determine its edge span.

ON A GENERALIZED DIFFERENCE SEQUENCE SPACES DEFINED BY A MODULUS FUNCTION AND STATISTICAL CONVERGENCE

  • Bataineh Ahmad H.A.
    • Communications of the Korean Mathematical Society
    • /
    • v.21 no.2
    • /
    • pp.261-272
    • /
    • 2006
  • In this paper, we define the sequence spaces: $[V,{\lambda},f,p]_0({\Delta}^r,E,u),\;[V,{\lambda},f,p]_1({\Delta}^r,E,u),\;[V,{\lambda},f,p]_{\infty}({\Delta}^r,E,u),\;S_{\lambda}({\Delta}^r,E,u),\;and\;S_{{\lambda}0}({\Delta}^r,E,u)$, where E is any Banach space, and u = ($u_k$) be any sequence such that $u_k\;{\neq}\;0$ for any k , examine them and give various properties and inclusion relations on these spaces. We also show that the space $S_{\lambda}({\Delta}^r, E, u)$ may be represented as a $[V,{\lambda}, f, p]_1({\Delta}^r, E, u)$ space. These are generalizations of those defined and studied by M. Et., Y. Altin and H. Altinok [7].

ON THE SOLUTION OF A MULTI-VARIABLE BI-ADDITIVE FUNCTIONAL EQUATION I

  • Park, Won-Gil;Bae, Jae-Hyeong
    • The Pure and Applied Mathematics
    • /
    • v.13 no.4 s.34
    • /
    • pp.295-301
    • /
    • 2006
  • We Investigate the relation between the multi-variable bi-additive functional equation f(x+y+z,u+v+w)=f(x,u)+f(x,v)+f(x,w)+f(y,u)+f(y,v)+f(y,w)+f(z,u)+f(z,v)+f(z,w) and the multi-variable quadratic functional equation g(x+y+z)+g(x-y+z)+g(x+y-z)+g(-x+y+z)=4g(x)+4g(y)+4g(z). Furthermore, we find out the general solution of the above two functional equations.

  • PDF

ON A FUNCTIONAL EQUATION ARISING FROM PROTH IDENTITY

  • Chung, Jaeyoung;Sahoo, Prasanna K.
    • Communications of the Korean Mathematical Society
    • /
    • v.31 no.1
    • /
    • pp.131-138
    • /
    • 2016
  • We determine the general solutions $f:\mathbb{R}^2{\rightarrow}\mathbb{R}$ of the functional equation f(ux-vy, uy+v(x+y)) = f(x, y)f(u, v) for all x, y, u, $v{\in}\mathbb{R}$. We also investigate both bounded and unbounded solutions of the functional inequality ${\mid}f(ux-vy,uy+v(x+y))-f(x,y)f(u,v){\mid}{\leq}{\phi}(u,v)$ for all x, y, u, $v{\in}\mathbb{R}$, where ${\ph}:\mathbb{R}^2{\rightarrow}\mathbb{R}_+$ is a given function.

STABILITY OF TWO FUNCTIONAL EQUATIONS ARISING FROM DETERMINANT OF MATRICES

  • Choi, Chang-Kwon;Kim, Jongjin;Lee, Bogeun
    • Communications of the Korean Mathematical Society
    • /
    • v.31 no.3
    • /
    • pp.495-505
    • /
    • 2016
  • Let $f:{\mathbb{R}}^3{\rightarrow}{\mathbb{R}}$. In this paper we prove the stability of functional inequalities ${\mid}f(ux+vy,uy-vx,zw)-f(x,y,z)f(u,v,w){\mid}{\leq}{\phi}(u,v,w)$ or ${\phi}(x,y,z)$, ${\mid}f(ux-vy,uy-vx,zw)-f(x,y,z)f(u,v,w){\mid}{\leq}{\phi}(u,v,w)$ or ${\phi}(x,y,z)$ for all $x,y,z,u,v,w{\in}{\mathbb{R}}$. Furthermore, we give refined descriptions of bounded functions satisfying the inequalities as in Albert and Baker [1].