Results 91 to 100 of about 1,067 (186)

$$L^p_{loc}$$ Positivity Preservation and Liouville-Type Theorems

open access: yesThe Journal of Geometric Analysis
AbstractOn a complete Riemannian manifold (M, g), we consider$$L^{p}_{loc}$$Llocpdistributional solutions of the differential inequality$$-\Delta u + \lambda u \ge 0$$-Δu+λu≥0with$$\lambda >0$$λ>0a locally bounded function that may decay to 0 at infinity.
Bisterzo, A, Farina, A, Pigola, S
openaire   +3 more sources

On nonnegative entire solutions of second-order semilinear elliptic systems

open access: yesElectronic Journal of Differential Equations, 2003
We consider the second-order semilinear elliptic system $$ Delta u_i=P_i(x)u_{i+1}^{alpha_i}quadhbox{in }mathbb{R}^N, quad i=1,2,dots,m $$ with nonnegative continuous functions $P_i$.
Tomomitsu Teramoto
doaj  

Second-order n-point eigenvalue problems on time scales

open access: yesAdvances in Difference Equations, 2006
We discuss conditions for the existence of at least one positive solution to a nonlinear second-order Sturm-Liouville-type multipoint eigenvalue problem on time scales.
Ma Ruyun, Anderson Douglas R
doaj  

Existence of Positive Solutions for a Class of -Point Boundary Value Problems

open access: yesAdvances in Difference Equations, 2008
This paper investigates the existence of positive solutions for a class of second-order singular -point Sturm-Liouville-type boundary value problems by using fixed point theorem in cones.
Zhang Xuemei, Ge Weigao
doaj  

A New Proof of a Liouville-Type Theorem for Polyharmonic Functions

open access: yesReal Analysis Exchange, 2005
The author gives simple proofs of Pizetti's formula and as a corollary, the Liouville theorem for polyharmonic functions.
openaire   +3 more sources

Positive solutions for fractional differential equations with variable coefficients

open access: yesElectronic Journal of Differential Equations, 2012
In this article, we study the existence of the positive solutions for a class of differential equations of fractional order with variable coefficients.
Yi Chen, Zhanmei Lv
doaj  

Second-order n -point eigenvalue problems on time scales

open access: yesAdvances in Difference Equations, 2006
We discuss conditions for the existence of at least one positive solution to a nonlinear second-order Sturm-Liouville-type multipoint eigenvalue problem on time scales.
doaj  

A generalization of Gordon's theorem and applications to quasiperiodic Schrodinger operators

open access: yesElectronic Journal of Differential Equations, 2000
We present a criterion for absence of eigenvalues for one-dimensional Schrodinger operators. This criterion can be regarded as an L^1-version of Gordon's theorem and it has a broader range of application.
David Damanik, Gunter Stolz
doaj  

Symplectic Structures on the Space of Space Curves. [PDF]

open access: yesJ Nonlinear Sci
Bauer M, Ishida S, Michor PW.
europepmc   +1 more source

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