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math.AT2012★ 6 cited
Presheaves of symmetric tensor categories and nets of C*-algebras
Ezio Vasselli
Motivated by algebraic quantum field theory, we study presheaves of symmetric tensor categories defined over the base of a space, intended as a spacetime. Any section of a presheaf…
math.AT2007★ 11 cited
A theory of bundles over posets
John E. Roberts, Giuseppe Ruzzi, Ezio Vasselli
In algebraic quantum field theory the spacetime manifold is replaced by a suitable base for its topology ordered under inclusion. We explain how certain topological invariants of t…