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

Victor Guillemin

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Author
Victor Guillemin
Publish Date
1989-03-21
Book Type
Paperback
Number of Pages
235
Publisher Name
Princeton University Press
ISBN-10
0691085145
ISBN-13
9780691085142
citemno
039543
SKU
9780691085142

Description

The subject matter of this work is an area of Lorentzian geometry which has not been heretofore much investigated: Do there exist Lorentzian manifolds all of whose light-like geodesics are periodic? A surprising fact is that such manifolds exist in abundance in (2 + 1)-dimensions (though in higher dimensions they are quite rare). This book is concerned with the deformation theory of M2,1 (which furnishes almost all the known examples of these objects). It also has a section describing conformal invariants of these objects, the most interesting being the determinant of a two dimensional "Floquet operator," invented by Paneitz and Segal.