On The Langlands Program: Endoscopy And Beyond

This is a collection of lecture notes from the minicourses in the December 2018 Langlands Workshop: Endoscopy and Beyond.

The volume combines seven introductory chapters on trace formulas, local Arthur packets, and beyond endoscopy.

It aims to introduce the endoscopy classification via a basic example of the trace formula for SL(2), explore the more refined questions on the structure of Arthur packets, and look beyond endoscopy following the suggestions of Langlands, Braverman-Kazhdan, Ngo, and Altug.

The book is a helpful reference for undergraduates, postgraduates, and researchers.