Cosmology in (2 + 1) -Dimensions, Cyclic Models, and Deformations of M2,1

Explore the intriguing world of theoretical physics with Cosmology in (2 + 1) -Dimensions, Cyclic Models, and Deformations of M2,1 by renowned author and physicist. Published by Princeton University Press in 1989, this insightful paperback spans 240 pages and delves into the fascinating question: Do Lorentzian manifolds exist where all light-like geodesics are periodic? Surprisingly, these manifolds are abundant in (2 + 1)-dimensions, a stark contrast to their rarity in higher dimensions. This book provides a comprehensive examination of the deformation theory of M2,1, which serves as a foundation for most known examples of these unique structures. Perfect for students and professionals alike, this work is essential for anyone interested in advanced cosmological concepts and the mathematical underpinnings of our universe. Discover the complexities of cyclic models and the rich landscape of (2 + 1)-dimensional cosmology today!