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Index Theory for Locally Compact Noncommutative Geometries - Memoirs of the American Mathematical Society (Paperback)
  • Index Theory for Locally Compact Noncommutative Geometries - Memoirs of the American Mathematical Society (Paperback)
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Index Theory for Locally Compact Noncommutative Geometries - Memoirs of the American Mathematical Society (Paperback)

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£75.50
Paperback 130 Pages / Published: 30/08/2014
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Spectral triples for nonunital algebras model locally compact spaces in noncommutative geometry. In the present text, the authors prove the local index formula for spectral triples over nonunital algebras, without the assumption of local units in our algebra. This formula has been successfully used to calculate index pairings in numerous noncommutative examples. The absence of any other effective method of investigating index problems in geometries that are genuinely noncommutative, particularly in the nonunital situation, was a primary motivation for this study and the authors illustrate this point with two examples in the text.

In order to understand what is new in their approach in the commutative setting the authors prove an analogue of the Gromov-Lawson relative index formula (for Dirac type operators) for even dimensional manifolds with bounded geometry, without invoking compact supports. For odd dimensional manifolds their index formula appears to be completely new.

Publisher: American Mathematical Society
ISBN: 9780821898383
Number of pages: 130
Dimensions: 254 x 178 mm

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