Results 11 to 20 of about 979,219 (176)

Trait-Based Drivers of Host Specificity in Freshwater Mussel-Fish Parasitic Interactions. [PDF]

Ecol Evol
Freshwater mussels (Unionidae) rely on an obligate parasitic larval stage on fish hosts, yet their host specificity remains poorly understood in a broader ecological and evolutionary context. By integrating phylogenetic, life‐history, and host‐use data, we show that host phylogenetic specificity is conserved but varies systematically with mussel life ...
Sánchez González I, Park AW, Capps KA.
europepmc   +2 more sources

Three symmetric positive solutions for Lidstone problems by a generalization of the Leggett-Williams theorem

Electronic Journal of Differential Equations, 2000
The authors deal with the existence of three positive solutions to the so-called Lidstone BVP \[ y^{(4)}=f(y,-y''), 0\leq t\leq 1, y(0)=y''(0)=y(1)=y''(1)=0. \] These solutions are required to be symmetric in the sense that they satisfy \(y(t)=y(1-t),\) for all \(t\in[0,1].\) The paper is organized as follows: In section 2 the authors provide some ...
Richard I. Avery, John M. Davis, Johnny Henderson   +2 more
openaire   +3 more sources

Violation of a Leggett-Garg inequality with ideal non-invasive measurements [PDF]

, 2012
The quantum superposition principle states that an entity can exist in two different states simultaneously, counter to our 'classical' intuition. Is it possible to understand a given system's behaviour without such a concept?
Pohl, Hans-Joachim, Briggs, G. Andrew D., Itoh, K.M., Riemann, H., Abrosimov, Nikolai V., Becker, Peter, Itoh, Kohei M., Gauger, Erik M.; id_orcid, Benjamin, S.C., Morton, John J. L., Knee, GC, Briggs, GAD, Abrosimov, N.V., Briggs, G.A.D., Riemann, Helge, Gauger, EM, Pohl, H-J, Benjamin, SC, Pohl, H.-J., Simmons, Stephanie, Thewalt, Mike L. W., Gauger, E.M., Riemann, H, Briggs, Andrew, Abrosimov, NV, Benjamin, Simon, Morton, J.J.L., Benjamin, Simon C., Simmons, S, Knee, George C., Simmons, S., Knee, G.C., Becker, P., Becker, P, Itoh, KM, Thewalt, MLW, Morton, JJL, Thewalt, M.L.W.   +37 more
core   +1 more source

On the Existence of Positive Solutions of Resonant and Nonresonant Multipoint Boundary Value Problems for Third-Order Nonlinear Differential Equations

Abstract and Applied Analysis, 2013
Positive solutions for a kind of third-order multipoint boundary value problem under the non-resonant conditions and the resonant conditions are considered. In the nonresonant case, by using Leggett-Williams fixed-point theorem, the existence of at least
Liu Yang, Chunfang Shen, Dapeng Xie, Xiping Liu   +3 more
doaj   +1 more source

Positive Solutions for Resonant and Nonresonant Nonlinear Third-Order Multipoint Boundary Value Problems

Abstract and Applied Analysis, 2013
Positive solutions for a kind of third-order multipoint boundary value problem under the nonresonant conditions and the resonant conditions are considered.
Liu Yang, Chunfang Shen, Dapeng Xie
doaj   +1 more source

On the Nonhomogeneous Fourth-Order p-Laplacian Generalized Sturm-Liouville Nonlocal Boundary Value Problems

Discrete Dynamics in Nature and Society, 2012
We study the nonlinear nonhomogeneous n-point generalized Sturm-Liouville fourth-order p-Laplacian boundary value problem by using Leray-Schauder nonlinear alternative and Leggett-Williams fixed-point theorem.
Jian Liu, Zengqin Zhao
doaj   +1 more source

Positive Solutions for Boundary Value Problems of Second-Order Functional Dynamic Equations on Time Scales

Advances in Difference Equations, 2009
Criteria are established for existence of least one or three positive solutions for boundary value problems of second-order functional dynamic equations on time scales.
Karaca IlkayYaslan
doaj   +2 more sources

Existence of three positive solutions for boundary value problem with fractional order and infinite delay

Annals of the West University of Timisoara: Mathematics and Computer Science, 2015
In this paper we investigate the existence three positives solutions by using Leggett-Williams fixed point theorem in cones for three boundary value problem with fractional order and infinite delay.
Benaouda Hedia
doaj   +1 more source

Multiple Positive Solutions for Nonlinear First-Order Impulsive Dynamic Equations on Time Scales with Parameter

Advances in Difference Equations, 2009
By using the Leggett-Williams fixed point theorem, the existence of three positive solutions to a class of nonlinear first-order periodic boundary value problems of impulsive dynamic equations on time scales with parameter are obtained.
Da-Bin Wang, Wen Guan
doaj   +2 more sources

Existence of Three Positive Solutions to Some p-Laplacian Boundary Value Problems

Discrete Dynamics in Nature and Society, 2013
We obtain, by using the Leggett-Williams fixed point theorem, sufficient conditions that ensure the existence of at least three positive solutions to some p-Laplacian boundary value problems on time scales.
Moulay Rchid Sidi Ammi, Delfim F. M. Torres   +1 more
doaj   +1 more source