Carlos Fresneda-Portillo is an Associate Professor at the University of Valladolid, Spain. Having held academic positions at several prestigious institutions, including Oxford Brookes University and the University of Reading in the United Kingdom, he has developed a strong research profile spanning both pure and applied mathematics. His work focuses primarily on the analysis of partial differential equations, with numerous publications in leading international journals. He also has a growing interest in mathematics education, particularly in developing innovative pedagogical approaches that make university-level mathematics more accessible, engaging, and effective for students.

Alberto Gámez-González holds an MSc in Applied Mathematics from Universidad Carlos III de Madrid. A former student of Universidad Loyola Andalucía and recipient of a competitive collaboration fellowship in the Department of Quantitative Methods, he has contributed a unique student perspective to the development of this book. His insight into the learning process helped transform advanced mathematical material into a clear, accessible, and engaging resource for students.