000			01837 a2200265 4500
008			220820b |||||||| |||| 00| 0 eng d
020			_a9780521870047
082			_a514.34 _bADE
100			_aAdem, Alejandro
245			_aOrbifolds and stringy topology
260			_bCambridge University Press, _c2007. _aCambridge:
300			_axi, 149p.; _bhbk; _c24cm.
440			_aCambridge tracts in mathematics, no. 171
504			_aIncludes references and index
520			_aAn introduction to the theory of orbifolds from a modern perspective, combining techniques from geometry, algebraic topology and algebraic geometry. One of the main motivations, and a major source of examples, is string theory, where orbifolds play an important role. The subject is first developed following the classical description analogous to manifold theory, after which the book branches out to include the useful description of orbifolds provided by groupoids, as well as many examples in the context of algebraic geometry. Classical invariants such as de Rham cohomology and bundle theory are developed, a careful study of orbifold morphisms is provided, and the topic of orbifold K-theory is covered. The heart of this book, however, is a detailed description of the Chen-Ruan cohomology, which introduces a product for orbifolds and has had significant impact. The final chapter includes explicit computations for a number of interesting examples. https://www.cambridge.org/core/books/orbifolds-and-stringy-topology/677A8058E1D88669C8EE85FF2442CFCD#fndtn-information
650			_aOrbifolds
650			_aTopology
650			_aQuantum theory
650			_aString models
650			_aHomology theory
650			_aManifolds--Mathematics
700			_aLeida, Johann _eCo-author
700			_aRuan, Yongbin _eCo-author
942			_2ddc _cTD
999			_c56662 _d56662