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【期刊论文】MULTIPLICITY RESULTS FOR A THIRD ORDER BOUNDARY VALUE PROBLEM AT RESONANCE
马如云, RUYUN MA
Nonlinear Analysis, Theory. Methods & Applications. Vol. 32, No.4, pp.493-499, 1998,-0001,():
-1年11月30日
O-epi maps,, solution set,, Lyapunov Schmidi procedure,, third order BVP,, at resonance.,
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马如云, Ruyun Ma a, *, , Bevan Thompson b
R. Ma, B. Thompson/J. Math. Anal. Appl. 303(2005)726-735,-0001,():
-1年11月30日
We consider boundary value problems for nonlinear second order differential equations of the formu”+ a(t)f (u) = 0, t∈ (0, 1),u(0) = u(1) = 0, where a ∈ C([0, 1], (0,∞)) and f :R→R is continuous and satisfies f (s)s >0 for s ≠0.We establish existence and multiplicity results for nodal solutions to the problems if either f0 = 0, f∞=∞ or f0 =∞, f∞ = 0, where f (s)/s approaches f0 and f∞ as s approaches 0 and ∞, respectively. We use bifurcation techniques to prove our main results.
Multiplicity results, Eigenvalues, Bifurcation methods, Nodal zeros
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【期刊论文】Global behavior ofpositi ve solutions ofnonlinear three-point boundary value problems
马如云, Ruyun Ma a, b, *, , Bevan Thompson b
R. Ma, B. Thompson/Nonlinear Analysis 60(2005)685-701,-0001,():
-1年11月30日
We investigate the structure ofthe positive solution set for nonlinear three-point boundary value problems ofthe form u"+ h(t)f (u) = 0,u(0) = 0, u(1) =λu(η),where η∈ (0, 1) is given, λ ∈ [0, 1 ] is a parameter, f ∈ C([0,∞], [0,∞]) satisfies f (s)>0 for s >0, and h ∈ C([0, 1], [0,∞]) is not identically zero on any subinterval of [0, 1]. Our main results demonstrate the existence ofcontinua ofpositi ve solutions ofthe above problem.
Multi-point boundary value problems, Global continuation principle ofLeray-Schauder, Continuum, Positive solutions, Bifurcation
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【期刊论文】Multiple positive solutions for nonlinear m-point boundary value problems
马如云, Ruyun Ma
R. Ma/Appl. Math. Comput. 148(2004)249-262,-0001,():
-1年11月30日
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马如云, RUYUN MA*, LISHUN REN
,-0001,():
-1年11月30日
Let a E C[0.1], b E C ([0.1], (-∞, 0)). Let φ1(t) be the unique solution of the linear boundrary value problem u"(t)+a(t)u'(t)+b(t)u(t)=0, t e (0.1), u(0)=0, u(1)=1. We study the multiplicity of positive solutions for the m-point boundary value problems of Dirichlet type u" +a(t)u' +b(t)u+g(t)f(u)=0, u(0)=0, u(1)-m-2Σi=1 a1u(ξi)=0, where ξi Σ(0, 1) and ai e (0, ∞), ie{1, …, m-2}, are given constants satisfying Σm-2, I=1 aiф1(ξi)<1. The methods employed are fixed-point index theory.
Multipoint boundary value problems,, Existence,, Positive solutions,, Fixed-point in-dex
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