This volume features lecture notes and a collection of contributed articles from the XI Symposium on Probability and Stochastic Processes, held at CIMAT Mexico in September 2013. Since the symposium was part of the activities organized in Mexico to celebrate the International Year of Statistics, the program included topics from the interface between statistics and stochastic processes. The book starts with notes from the mini-course given by Louigi Addario-Berry with an accessible description of some features of the multiplicative coalescent and its connection with random graphs and minimum spanning trees. It includes a number of exercises and a section on unanswered questions. Further contributions provide the reader with a broad perspective on the state-of-the art of active areas of research.Contributions by:Louigi Addario-BerryOctavio Arizmendi Fabrice BaudoinJochen Blath Loïc ChaumontJ. Armando Domínguez-MolinaBjarki EldonShui FengTulio GaxiolaAdrián González CasanovaEvgueni GordienkoDaniel Hernández-HernándezNoemi KurtJaime MartinezA. Murillo-Salas Jan PedersenJ.L. Pérez Mark PodolskijAlfonso Rocha-ArteagaJ. Ruiz de Chavez Orimar SauriShuenn-Jyi SheuGerónimo Uribe BravoYouzhou Zhou