Eugenio Hernández obtained his PhD from Washington University in St. Louis in 1981 under the guidance of Richard Rochberg and Guido Weiss. He has been a member of the faculty at Universidad Autónoma de Madrid, Spain, since 1982, where he is now a Professor of Mathematics. His research interests include the theory of wavelets and related systems such as frames, non-linear approximation, and invariant subspaces of unitary representations.Marco Maria Peloso obtained his PhD from Washington University in St. Louis in 1990. He has been a Professor of Mathematical Analysis at the Università degli Studi di Milano since 2007 and was previously at the Politecnico di Torino. He has held visiting positions at Michigan State University, the University of Missouri - Columbia, Washington University in St. Louis, and the University of Arkansas - Fayetteville. His research interests are in harmonic analysis, complex analysis in one and several variables, and related areas.Fulvio Ricci obtained his PhD from the University of Maryland in 1977 under the guidance of John Benedetto. He has been a Professor of Mathematical Analysis in Italy, first at the Politecnico di Torino and, since 2000, at the Scuola Normale Superiore di Pisa, where he is now Professor Emeritus. His research interests focus on harmonic analysis in Euclidean spaces and Lie groups.Fernando Soria obtained his PhD under the supervision of Mitchell Taibleson and Guido Weiss at Washington University in St. Louis. His mathematical interests have followed those of Guido Weiss over the years, encompassing harmonic analysis, singular integrals, and wavelets. More recently, he has been working in the area of nonlocal partial differential equations. He has been a Professor of Mathematics at Universidad Autónoma de Madrid since 1992.Anita Tabacco obtained her PhD from Washington University in St. Louis in 1986 under the guidance of Richard Rochberg and Guido Weiss. She has been a Professor of Mathematical Analysis at the Department of Mathematical Sciences at the Politecnico di Torino, Italy, since 1992. Her research interests include real and complex analysis, functional analysis, and harmonic analysis. She is also involved in the field of engineering education and university management.

• - 1. Guido Weiss: a few memories of a friend and an influential mathematician.- 2. Optimal non-absolute domains for the Cesàro operator minus the identity.- 3. An applicable variant of spectral synthesis for wavelets.- 4. An update on the compactness of bilinear commutators.- 5. Irregularities of distribution on two-point homogeneous spaces.- 6. Analytic families of operators in extrapolation theory with application to average operators.- 7. On Complex Analytic tools, and the Holomorphic Rotation methods.- 8. Speed of convergence in an ergodic theorem.- 9. Characterizations of product Hardy spaces on stratified groups by singular integrals and maximal functions.- 10. A sufficient condition for Haar multipliers in Triebel-Lizorkin spaces.- 11. On frames of smooth, compactly-supported wave packets adapted to tilings of frequency space.- 12. Singular integral operators and Hölder spaces in Dunkl Setting.- 13. An homage to Guido Weiss and his leadership of the Saint Louis team: Commutators of Singular Integrals and Sobolev inequalities.- 14. Time-Frequency Analysis Meets Adversarial Learning.- 15. On Low-Rank Convex-Convex Quadratic Fractional Programming.- 16. Crystalline measures and wave front sets.- 17. Muckenhoupt matrix weights for general bases.

Eugenio Hernández obtained his PhD from Washington University in St. Louis in 1981 under the guidance of Richard Rochberg and Guido Weiss. He has been a member of the faculty at Universidad Autónoma de Madrid, Spain, since 1982, where he is now a Professor of Mathematics. His research interests include the theory of wavelets and related systems such as frames, non-linear approximation, and invariant subspaces of unitary representations.Marco Maria Peloso obtained his PhD from Washington University in St. Louis in 1990. He has been a Professor of Mathematical Analysis at the Università degli Studi di Milano since 2007 and was previously at the Politecnico di Torino. He has held visiting positions at Michigan State University, the University of Missouri - Columbia, Washington University in St. Louis, and the University of Arkansas - Fayetteville. His research interests are in harmonic analysis, complex analysis in one and several variables, and related areas.Fulvio Ricci obtained his PhD from the University of Maryland in 1977 under the guidance of John Benedetto. He has been a Professor of Mathematical Analysis in Italy, first at the Politecnico di Torino and, since 2000, at the Scuola Normale Superiore di Pisa, where he is now Professor Emeritus. His research interests focus on harmonic analysis in Euclidean spaces and Lie groups.Fernando Soria obtained his PhD under the supervision of Mitchell Taibleson and Guido Weiss at Washington University in St. Louis. His mathematical interests have followed those of Guido Weiss over the years, encompassing harmonic analysis, singular integrals, and wavelets. More recently, he has been working in the area of nonlocal partial differential equations. He has been a Professor of Mathematics at Universidad Autónoma de Madrid since 1992.Anita Tabacco obtained her PhD from Washington University in St. Louis in 1986 under the guidance of Richard Rochberg and Guido Weiss. She has been a Professor of Mathematical Analysis at the Department of Mathematical Sciences at the Politecnico di Torino, Italy, since 1992. Her research interests include real and complex analysis, functional analysis, and harmonic analysis. She is also involved in the field of engineering education and university management.

• - 1. Guido Weiss: a few memories of a friend and an influential mathematician.- 2. Optimal non-absolute domains for the Cesàro operator minus the identity.- 3. An applicable variant of spectral synthesis for wavelets.- 4. An update on the compactness of bilinear commutators.- 5. Irregularities of distribution on two-point homogeneous spaces.- 6. Analytic families of operators in extrapolation theory with application to average operators.- 7. On Complex Analytic tools, and the Holomorphic Rotation methods.- 8. Speed of convergence in an ergodic theorem.- 9. Characterizations of product Hardy spaces on stratified groups by singular integrals and maximal functions.- 10. A sufficient condition for Haar multipliers in Triebel-Lizorkin spaces.- 11. On frames of smooth, compactly-supported wave packets adapted to tilings of frequency space.- 12. Singular integral operators and Hölder spaces in Dunkl Setting.- 13. An homage to Guido Weiss and his leadership of the Saint Louis team: Commutators of Singular Integrals and Sobolev inequalities.- 14. Time-Frequency Analysis Meets Adversarial Learning.- 15. On Low-Rank Convex-Convex Quadratic Fractional Programming.- 16. Crystalline measures and wave front sets.- 17. Muckenhoupt matrix weights for general bases.