Displaying similar documents to “Integral equations of the first kind of Sonine type.”

Existence of solutions for a class of second-order p -Laplacian systems with impulsive effects

Peng Chen, Xianhua Tang (2014)

Applications of Mathematics

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The purpose of this paper is to study the existence and multiplicity of a periodic solution for the non-autonomous second-order system d d t ( | u ˙ ( t ) | p - 2 u ˙ ( t ) ) = F ( t , u ( t ) ) , a.e. t [ 0 , T ] , u ( 0 ) - u ( T ) = u ˙ ( 0 ) - u ˙ ( T ) = 0 , Δ u ˙ i ( t j ) = u ˙ i ( t j + ) - u ˙ i ( t j - ) = I i j ( u i ( t j ) ) , i = 1 , 2 , , N ; j = 1 , 2 , , m . By using the least action principle and the saddle point theorem, some new existence theorems are obtained for second-order p -Laplacian systems with or without impulse under weak sublinear growth conditions, improving some existing results in the literature.

Singular Dirichlet boundary value problems. II: Resonance case

Donal O'Regan (1998)

Czechoslovak Mathematical Journal

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Existence results are established for the resonant problem y ' ' + λ m a y = f ( t , y ) a.e. on [ 0 , 1 ] with y satisfying Dirichlet boundary conditions. The problem is singular since f is a Carathéodory function, a L l o c 1 ( 0 , 1 ) with a > 0 a.e. on [ 0 , 1 ] and 0 1 x ( 1 - x ) a ( x ) d x < .