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Mixed weak type estimates: Examples and counterexamples related to a problem of E. Sawyer Ombrosi, Sheldy Javier Pérez Moreno, Carlos Maximal functions Mixed weak-type inequalities Singular integral operators Weights Análisis matemático 12 Matemáticas In this paper we study mixed weighted weak-type inequalities for families of functions, which can be applied to study classic operators in harmonic analysis. Our main theorem extends the key result from D. Cruz-Uribe, J.M. Martell and C. Pérez, Weighted weak-type inequalities and a conjecture of Sawyer, Int. Math. Res. Not., 30 2005, 1849-1871. Depto. de Análisis Matemático y Matemática Aplicada Fac. de Ciencias Matemáticas TRUE pub 2024-02-06T13:12:18Z 2024-02-06T13:12:18Z 2016 journal article VoR https://hdl.handle.net/20.500.14352/99510 0010-1354 10.4064/cm4939-6-2016 1730-6302 eng Ombrosi, Sheldy, y Carlos Pérez. «Mixed Weak Type Estimates: Examples and Counterexamples Related to a Problem of E. Sawyer». Colloquium Mathematicum, 2016, 1-14. https://doi.org/10.4064/cm4939-6-2016. open access application/pdf Instytut Matematyczny