José Madrid

activity

20172022

l^{p}

-improving property of the average operators

2 citations · 3 across the 8 of their papers we have counts for

collaborators

13 papers

math-ph2022

Comparison of Ising Models Under Change of Apriori Measure

José Madrid, Barry Simon, Daniel R. Wells

We study comparison of correlation functions for ferromagnetic generalized Ising models with two different apriori measures. One purpose of this note is to publicize some unpublish…

math.CA2021

On classical inequalities for autocorrelations and autoconvolutions

Jaume de Dios Pont, José Madrid

In this paper we study an autocorrelation inequality proposed by Barnard and Steinerberger. The study of these problems is motivated by a classical problem in additive combinatoric…

math.CA2021

Continuity of the gradient of the fractional maximal operator on $W^{1, 1} (R^{d})$

David Beltran, Cristian González-Riquelme, José Madrid +1

We establish that the map $f \mapsto ∣\nabla M_{α} f ∣$ is continuous from $W^{1, 1} (R^{d})$ to $L^{q} (R^{d})$ , where $α \in (0, d)$ , $q = \frac{d}{d - α}$ and $\mathca…

math.CA2020

Sharp inequalities for maximal operators on finite graphs, II

Cristian González-Riquelme, José Madrid

Let $M_{G}$ be the centered Hardy-Littlewood maximal operator on a finite graph $G$ . We find $p \to \infty lim ∥ M_{G} ∥_{p}^{p}$ when $G$ is the start graph ( $S_{n}$ ) an…

math.CA2020

Sunrise strategy for the continuity of maximal operators

Emanuel Carneiro, Cristian González-Riquelme, José Madrid

In this paper we address the $W^{1, 1}$ -continuity of several maximal operators at the gradient level. A key idea in our global strategy is the decomposition of a maximal operator,…

math.CA2020

Sharp Inequalities for maximal operators on finite graphs

Cristian González-Riquelme, José Madrid

Let $G = (V, E)$ be a finite graph and $M_{G}$ be the centered Hardy-Littlewood maximal operator defined there. We find the optimal value $C_{G, p}$ such that the inequality $$\text…

Comparison of Ising Models Under Change of Apriori Measure

On classical inequalities for autocorrelations and autoconvolutions

Continuity of the gradient of the fractional maximal operator on W1,1(Rd)

Sharp inequalities for maximal operators on finite graphs, II

Sunrise strategy for the continuity of maximal operators

Sharp Inequalities for maximal operators on finite graphs

Continuity of the gradient of the fractional maximal operator on $W^{1, 1} (R^{d})$