Results 41 to 50 of about 15,587,481 (320)

Positive Solutions of Periodic Boundary Value Problems for a Class of Second-order Ordinary Differential Equations [PDF]

, 2018
In this paper, we consider the existence of positive solutions to the second-order periodic boundary value problems ...
Kang, H. (Hongliang)
core  

Positive solutions of an obstacle problem [PDF]

Annales de la faculté des sciences de Toulouse Mathématiques, 1995
In this paper the author studies the existence of positive solutions of the obstacle problem, with a nonlinear term in the variational inequality. The variational problem is formulated in an exterior domain with a smooth boundary. A positive parameter \(\lambda\) is included in the variational inequality and a discussion is done according to the values
openaire   +2 more sources

Existence and nonexistence of positive solutions for the fractional coupled system involving generalized p-Laplacian

Advances in Differential Equations, 2017
In this article, we study a class of fractional coupled systems with Riemann-Stieltjes integral boundary conditions and generalized p-Laplacian which involves two different parameters. Based on the Guo-Krasnosel’skii fixed point theorem, some new results
Ying Wang, Jiqiang Jiang
semanticscholar   +1 more source

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

Population Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva, João Hemerson de Sousa, Adriana Josefa da Rocha, Manuella Feitosa Leal, Lucas Ariel de Sousa Aguiar, Tamaris Gimenez Pinheiro, Edson Lourenço da Silva   +6 more
wiley   +1 more source

Singular solutions of fully nonlinear elliptic equations and applications

, 2011
We study the properties of solutions of fully nonlinear, positively homogeneous elliptic equations near boundary points of Lipschitz domains at which the solution may be singular. We show that these equations have two positive solutions in each cone of $\
A. Ancona, A. Friedman, A. Quaas, A. Vitolo, A. Świech, B. Sirakov, Boyan Sirakov, Charles K. Smart, D. Gilbarg, D.A. Labutin, E. Hopf, E.R. Jakobsen, F. Punzo, H. Berestycki, H. Ishii, I. Capuzzo Dolcetta, J. Serrin, J.T. Kemper, K. Miller, K.-C. Chang, L.A. Caffarelli, L.A. Caffarelli, M. Borsuk, M.E. Amendola, M.G. Crandall, N. Winter, N.V. Krylov, P. Bauman, P.H. Rabinowitz, R. Jensen, S. Koike, S.N. Armstrong, S.N. Armstrong, Scott N. Armstrong, Y Pinchover   +34 more
core   +1 more source

Positive solutions of the diophantine equation

International Journal of Mathematics and Mathematical Sciences, 1981
Integral solutions of x3 + λy + 1 − xyz = 0 are observed for all integral λ. For λ = 2 the 13 solutions of the equation in positive integers are determined. Solutions of the equation in positive integers were previously determined for the case λ = 1.
openaire   +4 more sources

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source

Existence of a positive solution for a singular system [PDF]

Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 2010
We show the existence and non-existence of positive solutions to a system of singular elliptic equations with the Dirichlet boundary condition.
Da Silva Montenegro, Marcelo, Suárez Fernández, Antonio   +1 more
openaire   +2 more sources

Existence of positive solutions for singular fractional differential equations with infinite-point boundary conditions

, 2016
In this paper, we investigate the existence of at least three positive solutions to a singular boundary value problem of Caputo's fractional differential equations with a boundary condition involving values at infinite number of points.
Limin Guo, Lishan Liu, Yonghong Wu
semanticscholar   +1 more source

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source