Topological gravity in dimensions two and four

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Recent work by physicists on gravity in two dimensions has a natural generalization to four dimensions, formulated in terms of an analogue of Segal's category [defined for the study of conformal field theory].
A talk at the 1999 Utrecht Conference on operads

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Quantum Algebra, Mathematical Physics, Algebraic Geometry, Algebraic Topology, Category Theory, Differential Geometry, 14H10, 53C80,55N22

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http://salesiana.dossiersoluciones.com/handle/123456789/78907

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/9908006
 http://arxiv.org/abs/math/9908006

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arXiv