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math-ph2009
Topics on topology and superstring theory
Fabio Ferrari Ruffino
In this thesis we discuss some topics about topology and superstring backgrounds with D-branes. We start with a mathematical review about generalized homology and cohomology theori…
math-ph2009★ 7 cited
Revisiting pinors, spinors and orientability
Loriano Bonora, Fabio Ferrari Ruffino, Raffaele Savelli
We study the relations between pin structures on a non-orientable even-dimensional manifold, with or without boundary, and pin structures on its orientable double cover, requiring…