On January 15, 2026, Wikipedia turned 25, and that birthday demonstrates a simple, radical fact: a vast, volunteer-built reference work that stays free to read has become a foundational record of human knowledge and an infrastructure for how the internet answers questions, quietly propping up (…)

On January 15, 2026, Wikipedia turned 25, and that birthday demonstrates a simple, radical fact: a vast, volunteer-built reference work that stays free to read has become a foundational record of human knowledge and an infrastructure for how the internet answers questions, quietly propping up (…)

This book provides a concise and practical introduction to quantum computing, emphasizing an interactive, hands-on approach. It introduces and explores the essential concepts, principles and foundational quantum algorithms through guided modeling and simulation exercises. Each topic is developed (…)

Today, I am happy to announce a free interactive course, Introduction to Partial Differential Equations, that will help students all over the world master this important subject. This course introduces partial differential equations (PDEs) from scratch and covers the most important types and (…)

Whether you’re a student in mathematics, engineering or scientific fields, you’re likely to encounter complex analysis—the study of complex numbers and complex functions. For mathematicians, complex analysis is a beautiful subject that provides powerful connections between apparently distant (…)