On topological aspects of the birth of the universe |
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| Affiliation: | 1. International Center for Relativistic Astrophysics - ICRA, Rome, Italy;2. Physics Department, University of Rome “La Sapienza”, Rome, Italy |
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| Abstract: | The topological requirements are considered of extending matter fields in a three-dimensional universe to the whole compact four-manifold in quantum cosmology. In some cases, especially in the Skyrme model, the winding number of matter fields φ must be zero for a large class of manifolds. |
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