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math.AT2012★ 2 cited
Flat pairing and generalized Cheeger-Simons characters
Fabio Ferrari Ruffino
Let h^{*} be a multiplicative cohomology theory, h_{*} its dual homology theory and \hat{h}^{*} a differential refinement. We first construct the natural pairing between h_{*} and…
hep-th2012
Topics on the geometry of D-brane charges and Ramond-Ramond fields - Part II: Low-degree RR fields
Fabio Ferrari Ruffino
We discuss the geometry of the Ramond-Ramond fields of low degree via the language of abelian p-gerbes, working in type II superstring theory with vanishing H-flux. A Dp-brane is a…
hep-th2012
Freed-Witten anomaly and D-brane gauge theories
Fabio Ferrari Ruffino
We discuss the different nature of the gauge theories on a D-brane or a stack of D-branes, in type II superstring theory, as follows from the Freed-Witten anomaly. Usually on a D-b…