We are glad to announce the  4th workshop  “Mathematics for Artificial Intelligence and Machine Learning”, which will take place on January 21-23, 2026, at the Mathematics Department of Sapienza University of Rome. The workshop focuses on the interaction between mathematics, artificial intelligence, and machine learning. The goal is to encourage mathematical research in these areas, promoting the dissemination of results and facilitating interaction with other disciplines. Priority will be given to contributions proposed by young researchers. Participation and the presentation of contributions are also open to non-members of the UMI. To facilitate the participation of young researchers, no registration fees are required. To register, please visit the workshop website (https://sites.google.com/uniroma1.it/umiworkshop2025/math4aiml-umi-workshop). Participation is free, but registration is required. The workshop will include plenary lectures, keynote speaker lectures, contributed talks, and a poster session. The plenary lectures will be given by: • Paola Antonietti (Politecnico di Milano) • Massimo Fornasier (Technische Universität München) • Domenico Marinucci (University of Rome Tor Vergata) The keynote speakers will be: • Annalisa Barla (University of Genoa) • Vincenzo Bonifaci (Roma Tre University) • Pierpaolo Vivo (King's College, London) The deadline for submitting abstracts for contributed talks and the poster session is December 8, 2025. Logistics details and further information are available on the web page ( (https://sites.google.com/uniroma1.it/umiworkshop2025/math4aiml-umi-workshop). The event will conclude the thematic period on Data Science within the Eccellenza Scientific Program of the Mathematics Department at Sapienza University of Rome. Further information about the program can be found on this page (https://sites.google.com/uniroma1.it/excellence-department/home). The Scientific Committee Adriano Barra Alessandra De Rossi Ernesto De Vito Stefano Gualandi Giampaolo Leonardi Marco Maggesi Benedetta Morini Sandra Pieraccini Paolo Zunino The Organizing Committee Elena Agliari Adriano Barra Alberto Fachechi Giuseppe Visconti