This book consists of about 20 lectures on theoretical and observational aspects of astrophysical black holes, by experts in the field. The basic principles and

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Traditionally, Lie Theory is a tool to build mathematical models for physical systems. Recently, the trend is towards geometrisation of the mathematical descrip

This book is intended as an introductory text on the subject of Lie groups and algebras and their role in various fields of mathematics and physics. It is writt