ترغب بنشر مسار تعليمي؟ اضغط هنا

Carleman type inequalities for fractional relativistic operators

88   0   0.0 ( 0 )
 نشر من قبل Diana Stan
 تاريخ النشر 2019
  مجال البحث
والبحث باللغة English




اسأل ChatGPT حول البحث

In this paper, we derive Carleman estimates for the fractional relativistic operator. Firstly, we consider changing-sign solutions to the heat equation for such operators. We prove monotonicity inequalities and convexity of certain energy functionals to deduce Carleman estimates with linear exponential weight. Our approach is based on spectral methods and functional calculus. Secondly, we use pseudo-differential calculus in order to prove Carleman estimates with quadratic exponential weight, both in parabolic and elliptic contexts. The latter also holds in the case of the fractional Laplacian.



قيم البحث

اقرأ أيضاً

297 - Vaibhav Kumar Jena 2020
In this article, we present a novel Carleman estimate for ultrahyperbolic operators, in $ R^m_t times R^n_x $. Then, we use a special case of this estimate to obtain improved observability results for wave equations with time-dependent lower order te rms. The key improvements are: (1) we obtain smaller observation regions compared to standard Carleman estimate results, and (2) we also prove observability when the observation point lies inside the domain. Finally, as a corollary of the observability result, we obtain improved interior controllability for the wave equation.
294 - Amit Einav , Michael Loss 2011
The sharp trace inequality of Jose Escobar is extended to traces for the fractional Laplacian on R^n and a complete characterization of cases of equality is discussed. The proof proceeds via Fourier transform and uses Liebs sharp form of the Hardy-Littlewood-Sobolev inequality.
58 - A. Favaron 2006
Let ${cal A}(x;D_x)$ be a second-order linear differential operator in divergence form. We prove that the operator ${l}I- {cal A}(x;D_x)$, where $lincsp$ and $I$ stands for the identity operator, is closed and injective when ${rm Re}l$ is large enoug h and the domain of ${cal A}(x;D_x)$ consists of a special class of weighted Sobolev function spaces related to conical open bounded sets of $rsp^n$, $n ge 1$.
We establish Ambrosetti--Prodi type results for viscosity and classical solutions of nonlinear Dirichlet problems for the fractional Laplace and comparable operators. In the choice of nonlinearities we consider semi-linear and super-linear growth cas es separately. We develop a new technique using a functional integration-based approach, which is more robust in the non-local context than a purely analytic treatment.
التعليقات
جاري جلب التعليقات جاري جلب التعليقات
سجل دخول لتتمكن من متابعة معايير البحث التي قمت باختيارها
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا