Building the bicategory Span₂(C)
Rebro, Franciscus
Original · EN
Given any category C with pullbacks and a terminal object, we show that the data consisting of the objects of C, the spans of C, and the isomorphism classes of spans of spans of C, forms a bicategory. We denote this bicategory Span₂(C) and show that this construction can be applied to give a bicategory of n-manifolds, cobordisms of those manifolds, and cobordisms of cobordisms.
English translation
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