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1.
G. Cerami G. Devillanova S. Solimini 《Calculus of Variations and Partial Differential Equations》2005,23(2):139-168
In this paper we consider the problem
in
, where p > 2 and
if N > 2. Assuming that the potential a(x) is a regular function such that
0$" align="middle" border="0">
and that verifies suitable decay assumptions, but not requiring any symmetry property on it, we prove that the problem has infinitely many solutions.Received: 3 December 2003, Accepted: 10 May 2004, Published online: 22 December 2004 相似文献
2.
Ovidiu Savin 《Calculus of Variations and Partial Differential Equations》2005,22(3):303-320
We consider the following obstacle problem for Monge-Ampere equation
and discuss the regularity of the free boundary
. We prove that
is
if f is bounded away from 0 and
, and it is C
1,1 if
.Received: 4 February 2003, Accepted: 3 March 2004, Published online: 16 July 2004 相似文献
3.
Manuel del Pino Michal Kowalczyk Monica Musso 《Calculus of Variations and Partial Differential Equations》2005,24(1):47-81
We consider the boundary value problem
in a bounded, smooth domain
in
with homogeneous Dirichlet boundary conditions. Here
0,k(x)
$$
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is a non-negative, not identically zero function. We find conditions under which there exists a solution
which blows up at exactly m points as
and satisfies
. In particular, we find that if
,
0
$" align="middle" border="0">
and
is not simply connected then such a solution exists for any given
Received: 11 February 2004, Accepted: 17 August 2004, Published online: 22 December 2004 相似文献
4.
Min-Chun Hong Changyou Wang 《Calculus of Variations and Partial Differential Equations》2005,23(4):425-450
For
and
, we show that any minimizing biharmonic map from
to Sk is smooth off a closed set whose Hausdorff dimension is at most n-5. When n = 5 and k = 4, for a parameter
we introduce a
-relaxed energy
of the Hessian energy for maps in
so that each minimizer
of
is also a biharmonic map. We also establish the existence and partial regularity of a minimizer of
for
.Received: 5 April 2004, Accepted: 19 October 2004, Published online: 10 December 2004 相似文献
5.
We consider the following singularly perturbed semilinear elliptic problem:
where
is a bounded domain in R
N
with smooth boundary
,
is a small constant and f is some superlinear but subcritical nonlinearity. Associated with (I) is the energy functional
defined by
where
. Ni and Takagi ([29, 30]) proved that for a single boundary spike solution
, the following asymptotic expansion holds:
where c
1 > 0 is a generic constant,
is the unique local maximum point of
and
is the boundary mean curvature function at
. In this paper, we obtain a higher-order expansion of
where c
2, c
3 are generic constants and
is the scalar curvature at
. In particular c
3 > 0. Some applications of this expansion are given.Received: 14 January 2003, Accepted: 28 July 2003, Published online: 15 October 2003Mathematics Subject Classification (2000):
Primary 35B40, 35B45; Secondary 35J25 相似文献
6.
K. J. Brown 《Calculus of Variations and Partial Differential Equations》2004,22(4):483-494
The Nehari manifold for the equation
for
together with Dirichlet boundary conditions is investigated in the case where
. Exploiting the relationship between the Nehari manifold and fibrering maps (i.e., maps of the form
where J is the Euler functional associated with the equation), we discuss how the Nehari manifold changes as
changes and show how this is linked to results on bifurcation from infinity which are associated with the problem.Received: 8 December 2003, Accepted: 10 May 2004, Published online: 16 July 2004Mathematics Subject Classification (2000):
35J20, 35J25 相似文献
7.
Angela Pistoia Olivier Rey 《Calculus of Variations and Partial Differential Equations》2003,18(3):243-251
Let
,
, be a bounded domain as defined by Flucher, Garroni and Müller [6], which has a singular point
such that the Robins function achieves its infimum at
. Considering the elliptic problem
in
; u = 0 on
, with p = (N + 2)/(N-2),
, and
a minimizing solution of
,
concentrates at
as
goes to zero.Received: 15 September 2002, Accepted: 5 November 2002, Published online: 16 May 2003Mathematics Subject Classification:
35J65Angela Pistoia: The author is supported by M.U.R.S.T., project Metodi variazionali e topologici nello studio di fenomeni non lineari 相似文献
8.
Marc Oliver Rieger Paolo Tilli 《Calculus of Variations and Partial Differential Equations》2005,23(4):373-390
We study by means of
-convergence the asymptotics of the rescaled Mumford-Shah functional
when
and prove the existence of a
-limit. The limit functional is easy to handle and can be used as a simple approximation to the original Mumford-Shah functional. Moreover, its minimizers can be interpreted as a sort of asymptotic probability distribution of the sets
. Some examples illustrate the use of this method in image segmentation.Received: 12 June 2004, Accepted: 12 July 2004, Published online: 10 December 2004 相似文献
9.
Given an almost complex structure J in a cylinder of
(p > 1) together with a compatible symplectic form
and given an arbitrary J-holomorphic curve
without boundary in that cylinder, we construct an holomorphic perturbation of
, for the canonical complex structure J
0 of
, such that the distance between these two curves in W
1,2 and
norms, in a sub-cylinder, are controled by quantities depending on J,
and by the area of
only. These estimates depend neither on the topology nor on the conformal class of
. They are key tools in the recent proof of the regularity of 1-1 integral currents in [RT].Received: 2 October 2003, Accepted: 18 November 2003, Published online: 25 February 2004 相似文献
10.
Relaxation problems for a functional of the type
are analyzed, where
is a bounded smooth open subset of
and g is a Carathéodory function. The admissible functions u are forced to satisfy a pointwise gradient constraint of the type
for a.e.
being, for every
, a bounded convex subset of
, in general varying with x not necessarily in a smooth way. The relaxed functionals
and
of G obtained letting u vary respectively in
, the set of the piecewise C
1-functions in
, and in
in the definition of G are considered. For both of them integral representation results are proved, with an explicit representation formula for the density of
. Examples are proposed showing that in general the two densities are different, and that the one of
is not obtained from g simply by convexification arguments. Eventually, the results are discussed in the framework of Lavrentieff phenomenon, showing by means of an example that deep differences occur between
and
. Results in more general settings are also obtained.Received: 18 December 2002, Accepted: 18 November 2003, Published online: 16 July 2004Mathematics Subject Classification (2000):
49J45, 49J10, 49J53This work is part of the European Research Training Network Homogenization and Multiple Scales (HMS 2000), under contract HPRN-2000-00109. It is also part of the 2003-G.N.A.M.P.A. Project Metodi Variazionali per Strutture Sottili, Frontiere Oscillanti ed Energie Vincolate. 相似文献
11.
We study the regularizing effect of perimeter penalties for a problem of optimal compliance in two dimensions. In particular, we consider minimizers of
where
The sets
,
, and the force f are given. We show that if we consider only scalar valued u and constant
, or if we consider the elastic energy
, then
is
away from where
is pinned. In the scalar case, we also show that, for any
of class
,
is
. The proofs rely on a notion of weak outward curvature of
, which we can bound without considering properties of the minimizing fields, together with a bootstrap argument.Received: 5 March 2002, Accepted: 3 September 2002, Published online: 17 December 2002 相似文献
12.
Nicola Visciglia 《Calculus of Variations and Partial Differential Equations》2005,24(2):167-184
We present a generalized version of the Hardy-Sobolev inequality, in which the homogeneous potential
is replaced by any potential V belonging to the Lorentz space
. We show that the best constant in these inequalities is achieved provided that
where
. We also analyze the limit case
. Finally an application to a non-linear eigenvalues problem with rough potentials is presented.Received: 19 September 2004, Accepted: 15 November 2004, Published online: 22 December 2004 相似文献
13.
P. Courilleau J. Mossino 《Calculus of Variations and Partial Differential Equations》2004,20(1):65-91
We study the limit behaviour of some nonlinear monotone equations, such as:
, in a domain
which is thin in some directions (e.g.
is a plate or a thin cylinder). After rescaling to a fixed domain
, the above equation is transformed into:
, with convenient operators
and
. Assuming that
and the inverse of
have particular forms and satisfy suitable compensated compactness assumptions, we prove a closure result, that is we prove that the limit problem has the same form. This applies in particular to the limit behaviour of nonlinear monotone equations in laminated plates.Received: 16 October 2002, Accepted: 12 June 2003, Published online: 22 September 2003Mathematics Subject Classification (2000):
35B27, 35B40, 74Q15 相似文献
14.
Virginia De Cicco Giovanni Leoni 《Calculus of Variations and Partial Differential Equations》2003,19(1):23-51
A chain rule in the space
is obtained under weak regularity conditions. This chain rule has important applications in the study of lower semicontinuity problems for general functionals of the form
with respect to strong convergence in
. Classical results of Serrin and of De Giorgi, Buttazzo and Dal Maso are extended and generalized.Received: 1 June 2002, Accepted: 7 January 2003, Published online: 6 June 2003 相似文献
15.
Yavdat Il’yasov Thomas Runst 《Calculus of Variations and Partial Differential Equations》2005,22(1):101-127
This paper concerns with a family of inhomogeneous Neumann boundary value problems having indefinite nonlinearities which depend on a real parameter
. We discuss the existence and the multiplicity of positive solutions with respect to
. Developing the fibering method further, we can introduce a constructive concept of the calculation of certain nonlocal intervals
, the so-called sufficient intervals of the existence. Then we are able to prove some new results on the existence and the multiplicity of positive solutions
for
.Received: 22 December 2003, Accepted: 29 January 2004, Published online: 16 July 2004Mathematics Subject Classification (2000):
35J70, 35J65, 47H17 相似文献
16.
A Sobolev inequality with remainder term and critical equations on domains with topology for the polyharmonic operator 总被引:1,自引:0,他引:1
Thomas Bartsch Tobias Weth Michel Willem 《Calculus of Variations and Partial Differential Equations》2003,18(3):253-268
We prove a Sobolev inequality with remainder term for the imbedding
,
arbitrary, generalizing a corresponding result of Bianchi and Egnell for the case m = 1. We also show that the manifold of least energy solutions
of the equation
is a nondegenerate critical manifold for the corresponding variational integral. Finally we generalize the results of J. M. Coron on the existence of solutions of equations with critical exponent on domains with nontrivial topology to the biharmonic operator.Received: 21 March 2002, Accepted: 5 November 2002, Published online: 16 May 2003 相似文献
17.
For each
, we solve the following variational problem
and we show that
.Received: 4 November 2003, Accepted: 10 May 2004, Published online: 16 July 2004Radu Ignat: Radu.Ignat@ens.fr 相似文献
18.
B. Abdellaoui E. Colorado I. Peral 《Calculus of Variations and Partial Differential Equations》2005,23(3):327-345
For 1 < p < N and
we obtain the following improved Hardy-Sobolev Inequalities
where 1 < q < p and
if
,
if
, for some positive constant
.
Also we give an alternative proof of the optimal improved inequality for p = 2 by Wang-Willem in [16].
Received: 2 February 2004, Accepted: 12 July 2004, Published online: 3 September 2004
Mathematics Subject Classification (2000):
35J20, 35P05, 35R05, 46E30, 46E35
Partially supported by Project BFM2001-0183 相似文献
19.
We derive an explicit formula for the isoperimetric defect
of an arbitrary minimal surface
,in terms of a double integral over the surface of certain geometric quantities, together with a double boundary integral which always has the correct sign. As a by-product of these computations we show that the best known universal isoperimetric estimate, that
for any minimal surface
(due to L. Simon), may be improved to the universal estimate
.Received: 21 June 2001, Accepted: 16 June 2002, Published online: 5 September 2002 相似文献
20.
Georg Dolzmann Jan Kristensen 《Calculus of Variations and Partial Differential Equations》2005,22(3):283-301
We prove local higher integrability with large exponents for minimizers and Young measure minimizers of variational integrals of the form
where F is a Carathéodory integrand that resembles the p-Dirichlet integrand at infinity. The result yields existence of minimizing sequences with higher equi-integrability properties locally in
.Received: 5 April 2003, Accepted: 2 February 2004, Published online: 16 July 2004Mathematics Subject Classification (2000):
26B15,74N15Jan Kristensen: GD was supported by NSF through grant DMS0104118, and both authors were partially supported by EPSRC grant GR/R25002. 相似文献