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| Author(s) :- V. Guillemin | Format :- Paperback |
| Publisher :- Princeton University Press | Pub. Date :- 1989-03-01 |
| ISBN-13 :- 9780691085142 | |
| Series:- Annals of Mathematics Studies | |
| Dimensions :- 229 x 152 x 13 | |
| Weight :- 352 |
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 deals with the deformation theory of M2,1 (which furnishes almost all the known examples of these objects).