Thomas Krainer

Hörmander’s monumental four-volume treatise is a landmark work on the modern theory of linear partial differential equations authored by one of its grandmasters. It is a comprehensive and concise reference.

In seminars together with fellow students, I fondly remember working through chapters — a task we were mostly ill-equipped for at the time. Over the years, Hörmander’s books, especially the third volume, have remained a primary go-to reference for virtually anything I have come across in my own research work on linear partial differential equations.