This book presents, for the first time, the unpublished manuscripts of
Lars Hörmander, written between 1951 and 2007. Hörmander himself
organised the manuscripts and also wrote the notes explaining their
origins, presenting the material in the form he fully intended it to be
published in. As his daughter, Sofia Broström, mentions in the Foreword,
towards the end of his life, Hörmander "carefully went through his
unpublished manuscripts, checking and revising each of them with his
very critical eye, deciding what should be kept for posterity and what
should be thrown out". He also compiled the complete bibliography of all
his published mathematical works that is included at the end of the
present book.
Of both historical and mathematical value, the contents of this book
will undoubtedly inspire mathematicians of different horizons.