93 citations · 101 across the 3 of their papers we have counts for
3 papers
math.QA2008★ 8 cited
Groupoidification Made Easy
John C. Baez, Alexander E. Hoffnung, Christopher D. Walker
Groupoidification is a form of categorification in which vector spaces are replaced by groupoids, and linear operators are replaced by spans of groupoids. We introduce this idea wi…
math.AT2008
The Classifying Space of a Topological 2-Group
John C. Baez, Danny Stevenson
Categorifying the concept of topological group, one obtains the notion of a 'topological 2-group'. This in turn allows a theory of 'principal 2-bundles' generalizing the usual theo…
hep-th2004★ 93 cited
Higher Gauge Theory: 2-Connections on 2-Bundles
John Baez, Urs Schreiber
Connections and curvings on gerbes are beginning to play a vital role in differential geometry and mathematical physics -- first abelian gerbes, and more recently nonabelian gerbes…