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Listar Harmonic Analysis fecha de publicación 
  •   BIRD Principal
  • Analysis of Partial Differential Equations (APDE)
  • Harmonic Analysis
  • Listar Harmonic Analysis fecha de publicación
  •   BIRD Principal
  • Analysis of Partial Differential Equations (APDE)
  • Harmonic Analysis
  • Listar Harmonic Analysis fecha de publicación
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    • Mixed weak type estimates: Examples and counterexamples related to a problem of E. Sawyer 

      Ombrosi, S.; Pérez, C.Autoridad BCAM (2016-01-01)
      In this paper we study mixed weighted weak-type inequal- ities for families of functions, which can be applied to study classic operators in harmonic analysis. Our main theorem extends the key result from [CMP2].
    • Global Uniqueness for The Calderón Problem with Lipschitz Conductivities 

      Caro, P.; Rogers, K.M. (2016-01-01)
      We prove uniqueness for the Calderón problem with Lipschitz conductivities in higher dimensions. Combined with the recent work of Haberman, who treated the three- and four-dimensional cases, this confirms a conjecture of ...
    • Inverse scattering for a random potential 

      Caro, P.; Helin, T.; Lassas, M. (2016-05)
      In this paper we consider an inverse problem for the $n$-dimensional random Schrödinger equation $(\Delta-q+k^2)u = 0$. We study the scattering of plane waves in the presence of a potential $q$ which is assumed to be a ...
    • Reverse Hölder Property for Strong Weights and General Measures 

      Luque, T.; Pérez, C.Autoridad BCAM; Rela, E. (2016-06-30)
      We present dimension-free reverse Hölder inequalities for strong $A^{\ast}_p$ weights, $1 \le p < \infty$. We also provide a proof for the full range of local integrability of $A^{\ast}_1$ weights. The common ingredient ...
    • Quantitative weighted mixed weak-type inequalities for classical operators 

      Ombrosi, S.; Pérez, C.Autoridad BCAM; Recchi, J. (2016-06-30)
      We improve on several mixed weak type inequalities both for the Hardy-Littlewood maximal function and for Calderón-Zygmund operators. These type of inequalities were considered by Muckenhoupt and Wheeden and later on by ...
    • A note on the off-diagonal Muckenhoupt-Wheeden conjecture 

      Cruz-Uribe, D.; Martell, J.M.; Pérez, C.Autoridad BCAM (2016-07-01)
      We obtain the off-diagonal Muckenhoupt-Wheeden conjecture for Calderón-Zygmund operators. Namely, given $1 < p < q < \infty$ and a pair of weights $(u; v)$, if the Hardy-Littlewood maximal function satisfies the following ...
    • Borderline Weighted Estimates for Commutators of Singular Integrals 

      Pérez, C.Autoridad BCAM; Rivera-Ríos, I.P. (2016-07-01)
      In this paper we establish the following estimate \[ w\left(\left\{ x\in\mathbb{R}^{n}\,:\,\left|[b,T]f(x)\right| > \lambda\right\} \right)\leq \frac{c_{T}}{\varepsilon^{2}}\int_{\mathbb{R}^{n}}\Phi\left(\|b\|_{BMO}\f ...
    • Three Observations on Commutators of Singular Integral Operators with BMO Functions 

      Pérez, C.Autoridad BCAM; Rivera-Ríos, I.P. (2016-07-01)
      Three observations on commutators of Singular Integral Operators with BMO functions are exposed, namely 1 - The already known subgaussian local decay for the commutator, namely $\[\frac{1}{|Q|}\left|\left\{x\in Q\, : ...
    • $A_1$ theory of weights for rough homogeneous singular integrals and commutators 

      Pérez, C.Autoridad BCAM; Rivera-Ríos, I.P.; Roncal, L.Autoridad BCAM (2016-07-01)
      Quantitative $A_1-A_\infty$ estimates for rough homogeneous singular integrals $T_{\Omega}$ and commutators of $BMO$ symbols and $T_{\Omega}$ are obtained. In particular the following estimates are proved: \[ \|T_\Omega ...
    • On sums involving Fourier coefficients of Maass forms for SL(3,Z) 

      Jääsaari, J.; Vesalainen, E.V. (2016-09-10)
      We derive a truncated Voronoi identity for rationally additively twisted sums of Fourier coefficients of Maass forms for SL(3,Z), and as an application obtain a pointwise estimate and a second moment estimate for the sums ...
    • New bounds for bilinear Calderón-Zygmund operators and applications 

      Damián, W.; Hormozi, M.; Li, K. (2016-11-25)
      In this work we extend Lacey’s domination theorem to prove the pointwise control of bilinear Calderón–Zygmund operators with Dini–continuous kernel by sparse operators. The precise bounds are carefully tracked following ...
    • Mixed norm estimates for the Cesàro means associated with Dunkl-Hermite expansions 

      Boggarapu, P.; Roncal, L.Autoridad BCAM; Thangavelu, S. (2017)
      Our main goal in this article is to study mixed norm estimates for the Cesàro means associated with Dunkl--Hermite expansions on $\mathbb{R}^d$. These expansions arise when one considers the Dunkl--Hermite operator ...
    • Weighted mixed weak-type inequalities for multilinear operators 

      Li, K.; Ombrosi, S.; Picardi, B. (2017)
      In this paper we present a theorem that generalizes Sawyer's classic result about mixed weighted inequalities to the multilinear context. Let $\vec{w}=(w_1,...,w_m)$ and $\nu = w_1^\frac{1}{m}...w_m^\frac{1}{m}$, the main ...
    • On pointwise and weighted estimates for commutators of Calderón-Zygmund operators 

      Lerner, A. K; Ombrosi, S.; Rivera-Ríos, I.P. (2017)
      In recent years, it has been well understood that a Calderón-Zygmund operator T is pointwise controlled by a finite number of dyadic operators of a very simple structure (called the sparse operators). We obtain a similar ...
    • Improved A1 − A∞ and related estimates for commutators of rough singular integrals 

      Rivera-Ríos, I.P. (2017)
      An $A_1-A_\infty$ estimate improving a previous result in [22] for $[b, T_\Omega]$ with $\Omega\in L^\infty(S^{n-1})$ and $b\in BMO$ is obtained. Also a new result in terms of the $A_\infty$ constant and the one ...
    • A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function 

      Cao, M.; Li, K.; Xue, Q. (2017)
      Let $n\ge 2$ and $g_{\lambda}^{*}$ be the well-known high dimensional Littlewood-Paley function which was defined and studied by E. M. Stein, $$g_{\lambda}^{*}(f)(x)=\bigg(\iint_{\mathbb R^{n+1}_{+}} \Big(\frac{t}{t+|x-y ...
    • The Calderón problem with corrupted data 

      Caro, P.; García, A. (2017-01)
      We consider the inverse Calderón problem consisting of determining the conductivity inside a medium by electrical measurements on its surface. Ideally, these measurements determine the Dirichlet-to-Neumann map and, therefore, ...
    • Quantitative weighted estimates for rough homogeneous singular integrals 

      Hytönen, T.P.; Roncal, L.Autoridad BCAM; Tapiola, O. (2017-03-11)
      We consider homogeneous singular kernels, whose angular part is bounded, but need not have any continuity. For the norm of the corresponding singular integral operators on the weighted space $L^2(w)$, we obtain a bound ...
    • Sparse domination theorem for multilinear singular integral operators with $L^{r}$-Hörmander condition 

      Li, K. (2017-04-01)
      In this note, we show that if $T$ is a multilinear singular integral operator associated with a kernel satisfies the so-called multilinear $L^{r}$-Hörmander condition, then $T$ can be dominated by multilinear sparse operators.
    • A quantitative approach to weighted Carleson condition 

      Rivera-Ríos, I.P. (2017-05-05)
      Quantitative versions of weighted estimates obtained by F. Ruiz and J.L. Torrea for the operator \[ \mathcal{M}f(x,t)=\sup_{x\in Q,\,l(Q)\geq t}\frac{1}{|Q|}\int_{Q}|f(x)|dx \qquad x\in\mathbb{R}^{n}, \, t \geq0 \] are ...

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