Results 11 to 20 of about 274 (54)
Advances in Differential Equations, 2013 In this paper, we consider p-Laplacian multipoint boundary value problems on time scales. By using a generalization of the Leggett-Williams fixed point theorem due to Bai and Ge, we prove that a boundary value problem has at least three positive ...
A. Dogan
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Boundary Value Problems, 2014 By using the Banach contraction principle and the Leggett-Williams fixed point theorem, this paper investigates the uniqueness and existence of at least three positive solutions for a system of mixed higher-order nonlinear singular differential equations
Yaohong Li, Haiyan Zhang
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On singular $p$-Laplacian problems
Differential and Integral Equations, 2007 In this work we combine perturbation arguments and variational methods to prove the existence and uniqueness results for singular p-Laplacian problems.
K. Perera, Elves A. B. Silva
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The nonlinear Kneser problem for singular in phase variables second-order differential equations
Boundary Value Problems, 2014 For the singular in phase variables differential equation u″=f(t,u,u′), sufficient conditions are found for the existence of a solution satisfying the conditions φ(u)=c,u(t)>0,u′(t)0, where φ:C([
N. Partsvania, B. Puza
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Second-order initial value problems with singularities
Boundary Value Problems, 2014 Using barrier strip arguments, we investigate the existence of C[0,T]∩C2(0,T]-solutions to the initial value problem x″=f(t,x,x′), x(0)=A, limt→0+x′(t)=B, which may be singular at x=A and x′=B.MSC: 34B15, 34B16, 34B18.
P. Kelevedjiev, N. Popivanov
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Periodic solutions to the Liénard type equations with phase attractive singularities
, 2013 Sufficient conditions are established guaranteeing the existence of a positive ω-periodic solution to the equation u″+f(u)u′+g(u)=h(t,u), where f,g:(0,+∞)→R are continuous functions with possible singularities at zero and h:[0,ω]×R→R is a Carathéodory ...
R. Hakl, M. Zamora
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On positive solutions for a class of singular nonlinear fractional differential equations
, 2012 We study the existence and uniqueness of a positive solution for the singular nonlinear fractional differential equation boundary value problem D0+αu(t)=f(t,u(t),u(t ...
M. Jleli, B. Samet
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Existence of positive solutions to a non-positive elastic beam equation with both ends fixed
, 2012 This article is concerned with the existence of nontrivial solutions for a non-positive fourth-order two-point boundary value problem (BVP) and the existence of positive solutions for a semipositive fourth-order two-point BVP.
Haixia Lu, Li Sun, Jin-sheng Sun
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SOME RESULTS ON AN EQUIVALENCE RELATION ON THE SET OF CLOSED AND BOUNDED VALUED MULTIFUNCTIONS
, 2018 By using the notion of the fixed point set of multi-valued mappings, we introduce an equivalence relation on the set of all closed and bounded valued multifunction on a metric space. By using the notion we provide some related results.
S. M. Aydoǧan +2 more
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Positive blow-up solutions of nonlinear models from real world dynamics
Boundary Value Problems, 2014 In this paper, we investigate the structure and properties of the set of positive blow-up solutions of the differential equation (tkv′(t))′=tkh(t,v(t)), t∈(0,T]⊂R, where k∈(1,∞).
J. Gschwindl +3 more
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