11,778 research outputs found
Single Blow up Solutions for a Slightly Subcritical Biharmonic Equation
In this paper, we consider a biharmonic equation under the Navier boundary
condition and with a nearly critical exponent in and on
, where is a smooth bounded domain in and
. We study the asymptotic behavior of solutions of
which are minimizing for the Sobolev qutient as goes to zero. We
show that such solutions concentrate around a point as
, moreover is a critical point of the Robin's function.
Conversely, we show that for any nondegenerate critical point of the
Robin's function, there exist solutions concentrating around as
goes to zero.Comment: 19 page
Asymptotic Estimates and Qualitatives Properties of an Elliptic Problem in Dimension Two
In this paper we study a semilinear elliptic problem on a bounded domain in
with large exponent in the nonlinear term. We consider positive
solutions obtained by minimizing suitable functionals. We prove some asymtotic
estimates which enable us to associate a "limit problem" to the initial one.
Usong these estimates we prove some quantitative properties of the solution,
namely characterization of level sets and nondegeneracy.Comment: 23 page
Existence of Conformal Metrics on Spheres with Prescribed Paneitz Curvature
In this paper we study the problem of prescribing a fourth order conformal
invariant (the Paneitz curvature) on the -sphere, with . Using
tools from the theory of critical points at infinity, we provide some
topological conditions on the level sets of a given positive function under
which we prove the existene of a metric, conformally equivalent to the standard
metric, with prescribed Paneitz curvature.Comment: 20 page
Modularity-Based Clustering for Network-Constrained Trajectories
We present a novel clustering approach for moving object trajectories that
are constrained by an underlying road network. The approach builds a similarity
graph based on these trajectories then uses modularity-optimization hiearchical
graph clustering to regroup trajectories with similar profiles. Our
experimental study shows the superiority of the proposed approach over classic
hierarchical clustering and gives a brief insight to visualization of the
clustering results.Comment: 20-th European Symposium on Artificial Neural Networks, Computational
Intelligence and Machine Learning (ESANN 2012), Bruges : Belgium (2012
The Paneitz Curvature Problem on Lower Dimensional Spheres
In this paper we prescribe a fourth order conformal invariant 9the Paneitz
Curvature) on five and six spheres. Using dynamical and topological methods
involving the study of critical points at infinity of the associated
variational problem, we prove some existence results.Comment: 34 page
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