Presage: This is a collection of love stories inspired by real life. In these pages, the reader will discover tales that explore the different facets of love. Some stories take the form of fables, weaving deep metaphors, while others are accompanied by morals that invite reflection. Through each story, this work seeks to show the transformative power of love and how, in its different forms, it connects us beyond time.

Optimization problems subject to constraints governed by partial differential equations (PDEs) are among the most challenging problems in the context of industrial, economical and medical applications. Almost the entire range of problems in this field of research was studied and further explored as part of the Deutsche Forschungsgemeinschaft (DFG) priority program 1253 on “Optimization with Partial Differential Equations” from 2006 to 2013. The investigations were motivated by the fascinat...